Biopace Chainrings

Guess what fags! I don’t care what your shitty opinions are and I’m tired of moderating (aka putting bad words into) your windy dickbag comments. If you were planning on commenting on this post, please light a match inside your asshole instead. I know it’s fun to stick up for Sheldon’s shitty opinion on this now that he’s dead but I hope you all die of shitpox.

All due respect to Sheldon Brown, but I cannot believe that anyone can talk about BioPace chainrings as anything other than utter fucking filth. This is like lauding the brilliance of the Citroen hydropneumatic ball based engine stuff, or how great an idea it was to use nikasil-liners, how the Titanic design was truly brilliant, the Hindenberg was amazingly well thought out. The simple fact is, history has god damned spoken, and time and time again, the results are the same. Piece of shit. Officially disavowed by the people who made it, universally accepted as failures. Moderate fowardthink without any real analysis. Maths without fizzix. But every couple months, on the ONE cycling forum I read, there are five pages of huffing and puffing about how it was OK and how it was really a pretty good idea, etc.

That’s dumb. If you think Biopace is good, you have dumbness in you.

38 thoughts on “Biopace Chainrings

  1. Biopace has real advantages, one of which is that it is kinder to my knees. http://sheldonbrown.com/biopace

    I must admit a fondness for Citröens, always lusted for a DS, but never crazy enough to buy one. If I lived in France I probably would. French friends tell me they’re not all that difficult to work on once you know their peculiarities.

    The Hindenberg was a great airship, designed for helium flotation. With helium it would have been probably the safest way to cross the Atlantic, but the U.S. government forbade the sale of helium to the Zeppelin company, so they had to use dangerous hydrogen.

    I have no idea what nikasil liners might be, and no defense for the Titanic.

    Sheldon “Dumb” Brown
    +—————————————————————–+
    | When anyone asks me how I can best describe my experience |
    | in nearly 40 years at sea, I merely say, “uneventful.” |
    | Of course, there have been many gales and storms and fog |
    | and the like. But in all my experience, I have never been |
    | in any accident of any sort worth speaking about. I have |
    | never seen but one vessel in distress in all my years at sea. |
    | I never saw a wreck and never have been wrecked, nor was I |
    | ever in any predicament that threatened to end in disaster |
    | of any sort. –E. J. Smith, Captain, RMS Titanic |
    +—————————————————————–+

  2. An excellent defense all the way around, but I think we’re going to have to agree to disagree. I’ve seen a great many arguments for Biopace that frequently come down to “feel” or “comfort”, which are difficult to quantify and by definition subjective. My biopace chainwheels caused me nothing but problems, specifically long lasting and cumulative knee pain that was not present prior to my switch to biopace and that relented after my (and much of the worlds) hasty retreat from the technology.

    Nikasil liners were a cylinder wall treatment put into some BMWs and assorted other european cars that reacted unfavorably to sulphur. More here – http://en.wikipedia.org/wiki/Nikasil – A novel thoeretical solution to a very real problem that ended poorly because of a lack of testing. Replaced by Alusil – http://en.wikipedia.org/wiki/Alusil – once the problem was discovered.

    When I was in France, there was a Citroen 2CV Truck in the bus station parking lot of the Avignon train station for 300 euros. If I could have thought of a way to get it home (and eliminate the novelty spheres), I would almost certainly have purchased it. The shifter went horizontally into the dash and had a shift pattern that may have moved in some unseen fourth dimension, and it was cute as a button.

    As far as the Hindenberg, I understand the helium/hydrogen sales issue, but frankly, if someone told me I couldn’t get regular gasoline for my car, but they could rig it to run on a couple bumper mounted tanks of acetylene, I’d probably try to find somebody else to sell me gasoline. Again, an engineers over implementation issue. Hydrogen could certainly lift the craft, but obviously, the “could we catch on fire” question wasn’t explored enough.

    The Titanic suffered much this same fate, as I think even a scale model, properly tested, would have indicated the logical flaws of the design, but it sounded good in the mouth.

    PS – Sorry to hear about the legs. I read your journal often and it is a source of great amusement.

  3. I’ve had a Raleigh Randoneur touring bike that I’ve ridden since about 1990. When I was riding through South East Asia in 1992, I stopped in Singapore and replaced the worn out original crankset with a Shimano biopace set, which I have had ever since.

    Subsequently I’ve done thousands and thousands of miles on that biopace crankset and never had any significant knee problems.

    I would happily buy another biopace crankset tomorrow, if only they were available.

    I doubt whether the first commenter has ever even used biopace. Sounds like he’s just regurgitating something he’s picked up on the web somewhere

    In the early 90s, biopace was all the rage, until it suddenly fell from grace. Funny how so many cycle magazine editors were all in favour of it for a year or two, then all suddenly changed their minds again

    Everything goes in cycles (pardon the pun) and it’s my prediction that biopace (under a different name of course), will make a come back 10, 15 or 20 years down the line (by which time the first commenter might hopefully have managed to have calmed himself down a bit)

  4. I owned a KHS mountain bike with eliptical chainwheels for 16 years without an adverse incident and no knee pains. As a physician, I suspect that there are other anatomic and mechanical forces at work here that vary from one individual to another and may determine whether or not knee problems will result from any particular design.

  5. I think that’s a fair bet. No doubt that if I wore another man’s orthopedic inserts (especially if they’re correcting an extreme condition) I’d end up with foot pain (if not lower back pain). However, I’m gonna guestimate that 99% of all bikes were made with traditional round chainrings, much like 99% of shoes ever made were created with a non-prescription (or noncustom) footbed. So I stick with my assertion that we standardized on round chainrings for good reason(s).

    Oh, and to the commenter who is vaguely implying that my problems with biopace are related to my undying love of magazine editors or whatever, fuck you! Have a good one.

  6. I wore out two sets of SS biopace chainrings over the course of many thousands of miles on mountain bikes.
    Never once did my knees bother me, although others told me of their issues with them.
    I suspect my style of riding had much to do with my liking them, seat low, BMX style.
    As Sheldon said on his site, they worked very well for getting power to the ground and not spinning the rear wheel in a high torque, low speed situation.

    ——————————————————-
    “Though force can protect in emergency, only justice, fairness, consideration and co-operation can finally lead men to the dawn of eternal peace”

    Dwight D. Eisenhower

  7. This is the single most read entry in my blog, hands down. I still think biopace chainrings are dumb. I do tend to keep my saddle somewhat higher than others might. I haven’t ever been comfortable on a BMX, or actually on any bike that keeps the legs bent and the hips rotated (cruiser bikes, even a traditional long wheelbase recumbent I found to be fairly bothersome).

    I have been working on and off on a cruiser/townie style bike that is more to my liking, hips/legs/knees in the standard cycling position (actually, it’s a little more relaxed than my normal fare, partially because it’s an MTB frame and partially because it’s got too long of a fork on it, fuxoring all the angles). It is pretty. I should take more pictures of it now with it’s proper parts on.

  8. STILL RIDING BIOPACE CHAIN RINGS

    I've been riding my late 80's Schwinn 434 alot since I retired in 2008. We moved to Florida to be with family and I started cycling on a regular basis. Before long I was riding anywhere from 100 to 160 miles / week. Every Saturday there is a group ride led out of the local bike shop. Before long I was riding in what is called the break away group that rides approx 30 miles with an 18+ average speed, sprints up to 33 mph.
    On one of these rides a friend commented on my chain rings being biopace, saying “I thought Biopace went out with the Carter administration.” I thought nothing of it. When I got home I goggled Biopace chain rings and discovered Sheldon Brown and the controversy surrounding them. Sheldon Brown is no longer with us but he had some good things to say about Biopace. Biopace chain rings are elliptical rather than round. The design was to provide more power on the down stroke. There is not a lot of information to support or condemn Biopace chain rings. Keep in mind that I still ride a 20+-year-old bike so I’m slow to change anything and spend money on the latest fad. I need to be able to support the fact that I still ride an old school bike with those controversial chain rings. My ability to ride with the faster riders in our group should be enough.
    My own impression is the condemnation is a lot to do about nothing. I believe poor marketing led to their demise. I believe that the manufacturers stopped their production because of poor reviews and also to save money by having one or two less patterns to deal with. It was reported that they were best suited for lower cadence,(<90). Oops, not good information for someone who wants to ride fast. It was stated that they were easier on the knees. Cadence > 100 is common for me. The only aches and pains I experience are in my one shoulder that I attribute to an old injury. Knee pain is related more to seat height than anything else, I feel good in the knees. My cadence is a little jerky sometimes in the pace line, causing me to over pace, under pace. I’ve had no complaints about my pace line riding but there may be some advantage to round chain rings in the pace line. No need to get a new bike, just change out the chain rings. Maybe I’ll change the steel front fork to carbon fiber while I’m at it, may help my shoulder. Upgrading the wheels will give me more speed. It would be less expensive to buy a new bike, but the upgrades could be done under my wife’s radar. I could tell her that I’m trying to get better cholesterol and blood pressure numbers, the doctor or the bike, easy decision for me. I probably won’t do anything. Gust up to 35 mph today, my training partner will beat the crap out of me. In southwest Florida you need to accept the wind as your training partner

  9. Hope your cunt falls off Ray!

    Just because you can use something without harm for years doesn't mean it's good to use. Your anecdotal evidence does not trump mine simply because of some strange authority you have granted yourself. I submit again, if biopace were as good as you say it is, you wouldn't be able to buy anything else. If it happens to fit your biomechanics, and not mine, but we can both ride round rings, what is the better solution? It's like prayer therapy for cancer. Say all you did was pray and get better, does that mean we should all pay attention to your shit and not the dozens of folks who get better following traditional medical protocols?

    If a device doesn't solve anything, the market roots out that weakness and it falls off the shelves. This happened with biopace, it happened with "hite rite springs" (though these are coming back with adjustable seatposts), it happened with delta brakes, and countless other "essential" technologies over the years.

    Also thank you for the pointless ramble about living in Florida.

  10. WOW, if I had feelings they might be hurt. Round rings or die! Years of use without harm has lead me to say that Biopace works for me , can't say what might work for you. May be that you are both weak kneed and limp wristed, probably sit down to pee for all I know. It's easy to see but hard to foresee, bike riders will buy anything, Biopace may come round again, ( that's intended as humor, round again, get it . You sound like someone who would fail to see the humor intended).

  11. Just a question for Jarvitron : why don't you ride a bent ? It is far faster than every upright bike. As far as it is faster, do we have to exclude normal bicycles ?
    You seems to forget one thing, perhaps 95% of human beans 🙂 cannot pedal more than 80 rpm. For those, the Biopace is far better just because it offer better comfort and smooth. I experiment that on my wife : while climbing we had to wait for her on her normal bike. We just exchange our bicycle : let her the heavy biopace mountain bike (with big tires) and take the normal bike. Well, it was harder for me (but you will say I knew the difference so you can say it's psy !!!), but she was going up faster and we hadn't to wait for her anymore.
    In fact, I understood the interest of Biopace after that : I couldn't explain her speed difference as soon as she had not a different pdm with the mountain drive (she didn't use shorter gears).

    You don't need and like Biopace, I think it won't be difficult for you to find round crankset. I like them and I just find a new one on e-bay. My wife will be happy with it !!!

  12. Dude, your logic is so far off. Just because something has become standard while alternatives flounder doesn't make it better… just more popular.
    All the speed records for bikes are set on recumbents these days—there's no question it's a faster design. But who the hell rides them? Pretty much just rich old men. Does the fact that they are vastly less popular than traditional bikes make them a faulty design? Hell no. Its just that the upright bicycle design has taken root and that is unlikely to change, ever. Elliptical chainwheels are the same deal—they're more complex and expensive than round, and as such may never reach the same popularity, but there is ample evidence that they work better for some folk.

  13. In design, as in all things: Better is the enemy of good enough.
    “works better for some folk” means it's like an orthotic or glasses,
    it's a bandaid to a physical ailment. If you are suggesting
    prescription chainwheels for those who really need it, I agree, but
    they put those worthless fucking chainrings on a millionteen bikes
    because they were trying to sell you snake oil. It's like the pills
    they have now for “restless leg disorder”, it's a solution to a
    problem nobody fucking has, or at most, perhaps… 1% of the
    population has.

    Quite frankly, the fact that every three months for the past two years
    some random asshole has wandered out of the woodwork bound and
    determined to convince me that I'm waaaay out of line here is MORE
    PROOF that human beings will sell themselves ANYTHING. I hope you are
    enjoying your penis enhancement juices and your HEPA filters (that you
    never replace the element on) and your bottled water. Please wait for
    Biopace III which will come out at the same time as Shimano Ultegra
    12-speed and then somebody will bring back Microdrive you little
    editorial obsessed tech weenies.

  14. In design, as in all things: Better is the enemy of good enough.
    “works better for some folk” means it's like an orthotic or glasses,
    it's a bandaid to a physical ailment. If you are suggesting
    prescription chainwheels for those who really need it, I agree, but
    they put those worthless fucking chainrings on a millionteen bikes
    because they were trying to sell you snake oil. It's like the pills
    they have now for “restless leg disorder”, it's a solution to a
    problem nobody fucking has, or at most, perhaps… 1% of the
    population has.

    Quite frankly, the fact that every three months for the past two years
    some random asshole has wandered out of the woodwork bound and
    determined to convince me that I'm waaaay out of line here is MORE
    PROOF that human beings will sell themselves ANYTHING. I hope you are
    enjoying your penis enhancement juices and your HEPA filters (that you
    never replace the element on) and your bottled water. Please wait for
    Biopace III which will come out at the same time as Shimano Ultegra
    12-speed and then somebody will bring back Microdrive you little
    editorial obsessed tech weenies.

  15. Biopace performed for me exactly as Shimano's research and development intended. Increased torque. No knee problems. Now I look for new old stock on Ebay. I suspect, as is often the case with the most vocal, opinioned bloggers, that they never actually used Biopace. (But, after reading this, they will now claim they've used it.)

  16. I used to suspect that all the supporters of Biopace are self obsessed
    dickbags who write passive aggressive comments on blog posts from two
    years ago, but thanks to the magic of all these comments, I now have
    scientific proof.

  17. What should i replace my Biopace 50 chainrings with? What is compatible? Thanks for any help on this – the Biopace do hurt my knees.

  18. Your argument against Biopace lack specifics on why you thought it was a bad design:

    “Officially disavowed by the people who made it: Oh really?” – Show me the links.
    “Universally accepted as failures.” – ORLY?
    “Moderate fowardthink without any real analysis.” – What’s your analysis revealed there Einstein?
    “Maths without fizzix.” – Way to get all ghetto, again, no substance.

    On top of that, you insulted and got a response from Sheldon Brown, a true saint to the cycling industry. God rest his soul, it’s great that he didn’t take you too seriously, but I triple dog dare you to put your real name and face on senseless opinions like that. It’s like insulting Mother Teresa’s peace efforts. “Wah wah wah, Biopace sucked!” Truly groundbreaking work, jackass.

  19. Fuck you cunt. Sheldon doesn’t get special treatment just because he died a year after I wrote this article. And it’s not like SB invented biopace you mealy mouthed debate club reject, he’s just another gimmick tech follower who happened to have an encyclopedic memory. God bless him and all his contributions and all, but he liked him some backwards ass technology. And my name and face is associated with my blog everywhere. My name is Aaron Walker, I live in Portland fucking Oregon, and I proudly stand by a post I wrote in 2007 about a technology that for the most part died in 1994, despite the two year long crusade by wannabe hero worshiping apologists whose mommas should have simply let run down into the ass crack instead of scooping them back in. Get fucked forever biopace hero! I hope that Christ holds and keeps you in His Kingdom Eternal.

  20. >>Just because something has become standard while alternatives flounder doesn’t make it better… just more popular.

    see: Dvorak

  21. Pretty sure I addressed this in an earlier comment but I’ll reiterate for those of you who are slow: “Eat the corn out of my shit you cycling gadget addicted penis cheese”

  22. Hey, I have only been cycling for 3 years. Prior to that, I did MTB and BMX.

    I ride a Cannondale SR400, its ok pretty solid. As I am new to cycling and live in Tucson the roads suck. So I am on Mavic Open pros , and currently doing research about Bio-Pace.

    I ride on the shimano biopace. At first I had absolutely no idea what it was. It wasn’t until people started pointing it out that I noticed it. I have heard stuff from; it is horrible, and why do I ride on it, and also from some old cyclists saying they work great.

    After close to ONLY one year of riding on the bio pace, I have not experienced any knee problems of any sort ( Which I understand I have only been riding it for one year; not long enough to clearly say that), I did the Tour De Tucson last month on it, and I have also put on over 500 miles on the crank alone. When I did the tour (I only did the 66 mile because I had a broken hand in a cast) I placed 148 out of 1225 riders and averaged at 18.1 mph. It was my first tour, and I was pretty pleased with my placings. One thing I noticed, is going up hill, I was absolutely demolishing people. It happened every down stroke, I would literally jump ahead with each stroke.

    Now all that being said this obviously does not support one side or the other. This is simply my experience so far with my bio pace crank. Now I absolutely love it, and I look for it every where. Honestly, when I go into bike shops and ask for used bio, they laugh at me, and tell me how bad it is. I ALWAYS in return ask if they have ever ridden it. I typically get the same reply. No, or my friend once had one.

    As far as this debate goes as I am still trying to come to a conclusion of all this. But honestly Jarvitron, reading your posts has made me question this further. Why is it some people get so heated about the bio pace? Its a fucking crank on my bike? if you don’t like it, thats fine. I don’t like rings now, and I can clearly distinguish the difference. But thats not going to make me go on the internet and start a web fight (‘debate’ as you called it) about this topic. Now if you wanted to inform me this is horrible for my legs and that I really shouldn’t be riding it. I could take that and reconsider everything. But with your arguments of ;

    “I used to suspect that all the supporters of Biopace are self obsessed
    dickbags who write passive aggressive comments on blog posts”

    I really can’t take you seriously at all. Who is the self obsessed all knowing dick bag now on this blog post?

    Yes I am trying to get to the bottom of this bio-pace debate, even if that means reading through stupid comment pages and having to see people like you post on these.

    Why is it you hate bio pace so much? I could see if you we’re stuck riding it or something and it just pissed you the fuck off. But shit, get over it dude.

    Jarvitron, if you do reply to my post. I hope the response is not something along the lines of you wanting me to eat corn out of your ass, with my penis cheese. Or whatever the fuck you would consider some one like me, a (SO FAR) supporter of bio pace, actually taking opinions of wether I should be riding it.

  23. Apologies for rousing this ancient post again (and risking more four-lettered insults from the strangely abusive author). I stumbled here after searching for “biopace knee”.

    I did my first ever 100-mile ride 3 days ago. Solo, and with about 20 miles of harsh dirt road in the middle. My taint is recovering, but my right knee is still a bit whacked. Yes, my touring bike has Biopace rings – I built it up not long ago using parts off a nice barn-find ’80s road bike that didn’t fit me. Most of my riding (over the last 20 years or so) has been on mountain bikes with round rings.

    So, I’m not sure whether my knee is tweaked because I rode further than I’m used to, because I was too lazy to spin properly for the last 30 miles, because my cleat position was a bit off, because my shoes are too flexible and a tad too small, because I have genetically bad knees, or because of the evils of Biopace. All of these are likely contributing factors.

    I’m a Biopace agnostic.

    What I take exception to is your assessment of the Titanic. Having written a thesis on the damaged stability of ships for my Naval Architecture degree (albeit some 15 years ago), I’m better qualified in this field than I am in egg-shaped chain rings.

    The Titanic was the first ship designed to even consider surviving a ruptured hull. Prior to that, it was a certainty – if you put a hole in the side, the ship was going to the bottom of the ocean unless you could pump the water out faster than it came in.

    The Titanic raised the bar, and introduced the design philosophy that is still in use today. They divided the hull into watertight compartments, such that the ship would stay afloat with any _two_ compartments punctured. A quantum leap in thinking.

    “Unsinkable” was all puff. Made up by the marketeering department, for use by the magazine editors of the day. It would certainly sink if three compartments flooded. They holed five (or six, depending on source).

    Nearly 100 years later, we understand the fracture mechanics of cold steel better, and we’re better able to calculate the survivability of damaged vessels. So we do.

    Current design rules take into account the stability of every possible flooding combination and the probability of damage causing that damage state. Compartments are optimised based on these results. If they had attempted such calculations (by hand) when designing Titanic, they’d still be working today.

    Titanic sank because it hit an iceberg, not because it was a badly designed vessel. Any other ship afloat at the time would have sunk. It was the safest ship of its day, and it insults the designers to compare it with Biopace chainrings.

  24. As I read through the blog everyone states their own line of bullshit about Biopace. Yep, I own a set and have some roundies too. The fact is that NO ONE in this blogs brings to bear any scientific test on the Biopace. All we here is individual feel and taste crap. How about getting a hold of some MIT boston biker and have him do a true mechanical test and stats analysis. Not a hard deal but requires a force meter and some mechanical setup. Run the damned test and check out the force curves through the rotation under various conditions and we’ll have the answer…then someone will lokk fucking stupid and some will look brilliant.

    Dread Pirate..dead on about the Gasbag…

  25. I have only used Biopace a couple of times – my brother had it on his bike. I did not notice much of it, except for a positive change in up-hill performance or the first bit of a sprint. After that felt very similar to regular’s.

    I do have severe knee problems now – 14 years later – but I doubt they are the issue of a few days of biopace. Riding overweighed, oversized bikes for years in my youth or just a stupid wrong step during house-moving might have.

    I found Jarvitron’s initial posting quite well done – I do appreciate a diss with humour. The responses were pretty good as well, pro’s and con’s all over the place.

    I dont quite understand what frustrated 10-year old took over his account and starting posting the low grade nonsense and swearing. But hey, perhaps the initial posting was a lot more serious than I thought.

    Jarv, take it easy. Take a rest. Enjoy the discussion, contribute a bit – or if you dont have anything to contribute, just ignore us. You started this crap, live with it 😉

  26. Oh. Just because the Concorde (the worlds first supersonic jetliner) was taken out of service in the end does not mean it was a ‘shit’ design, or poorly researched.

    It was novel, interesting, conceptually daring. Commercially it was not quite what it could have been or what the designers might have expected – in thanks to a numerous small and some larger accidents causing the final demise of the ‘first and only’ supersonic jetliner.

    I cannot say for sure if biopace was properly researched and tested – but it’s line of thought is not completely nonsensical. There are many mechanical and bio-mechanical ways of motion that use a biopace-like transfer of energy (in many many applications).

    Right. Eh. That was it. Concorde, Biopace. And all.

  27. I just discovered I am using biopace rings. I never noticed them. I looked up the net to see what they were and presto. Sad to see people taking this so seriously. My guess though is that if they worked they’d still be around. All the money spent on being 1/100th of a second faster should have meant they’d still be around if they made any difference. At the moment I like mine more because they’re different 😛

    Peace and love… and if you don’t like peace and love, then you just need more of it!

  28. I would hazard a guess that the legal department at Shimano killed it due to liability issues…..of course that means there could be nothing wrong with it at all. Just the possibility of getting sued….

    I plan to build a single speed/fixed gear training/commuting bike with some NOS biopace and try it out myself….I hope it will help me better balance climbing ability and gearing for speed.

    I read Sheldons’ experiences, and learned from them, and will try it for myself. I learned nothing from the asshat Jarvitron.

  29. Hi all. I found this discussion via a google search for Biopace. I am rebuilding an 80’s vintage mountain bike for street use. My plan is for using Biopace rings on it. I have bad knees due to a genetic defect and I hope that this will help.

    My opinion on round versus eliptical chainrings is simply “Use whatever works best for you”. I know a bit about ergonomics and that methodology is pretty much my mantra. Shoot, someday I’m going to build a bike with a microshift grip shifter for the front and a trigger shifter for the rear. Why? Because I think that it would work better for me.

  30. I have ridden both biopace and round chainrings on mountain, road, single speed and road bikes. After tens of thousands of miles of riding, I have reached the following personal conclusions: Biopace cranks are great for slow trail riding and loaded touring applications; Round rings are best for faster cadence road or mountain racing applications. These are my opinions so take ’em or leave ’em. I have heard more than my share of strong opinions from young, attention seeking, smart ass punks.

    Moral: Don’t follow someone unless you are sure they know what they are talking about. Be thoughtful, respectful, and open-minded. Then make up your own mind.

  31. I have an old Gary Fisher that some previous owner converted to biopace cranksets in some far off past. I got the bike used, and never even noticed that it was equipped with what I had always thought of as a stupid gimmick. I have psoriatic arthritis, and it has effected my knees, so I am very sensitive to anything that puts undue stress on these joints. I’m not defending the biopace, as I don’t have enough knowledge to have anything more than an opinion. However, the first week owning this bike, and riding it up and down hills (paved roads), my knees felt great. I was powering my way up hills with relative ease, and no howling pain in my knees the next morning. It was noticeably more comfortable and easier to ride than my Trek, even with comparable size chain rings. When I finally got around to tearing down the bike to repack the bottom bracket and change the cables, I noticed it was equipped with a biopace crankset. I’ll be damned. Maybe the science behind the biopace is valid, maybe it’s crap. But, at least for me, the damn thing works as Shimano claimed. And I know full well that, if I had known it was a biopace crankset at the time I got the bike, I would have sworn up and down that it caused me endless pain, and I would have changed it. The main disadvantage I can possibly see at this point is the possibility that the front derailuer will be a bitch to adjust properly when the time comes.

  32. Just a quick thought on BioPace and fisting my own asshole. I bought a 1988 Raleigh (Royal) touring bike from the Nottingham factory equipped with BioPace when I was stationed in England. I did heavy cyclecamping touring all over Northern Europe in the late 80’s and early 90’s (including Switzerland) and NEVER walked up a hill. No knee problems, no nothing, no lube, no wristbands. Changed out the crank in the mid 90’s to a regular non BioPace crankset and unfortunatley, I don’t seem to climb as faggot. I returned to England 5 years ago to do Land’s End to John O’Grotes and had to walk up a lot of hills. (I realize that 20 years ago I was a superstar and now I’m a Fat Ass) but I’m looking for a triple crank BioPace for a return Land’s End to John O’Grotes in a year or two. I liked it and it seemed to work for the Shit Fucking, Ass Slut Loaded Tourist!!!

  33. I love this thread. It has inspired me to bring an old Miyata back to life. Thanks for the entertainment!!

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