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Crank length info link inside.(6 posts)

Crank length info link inside.Mike Tea
Nov 18, 2003 11:33 AM
Right here at
come on, fix the link (nm)sievers11
Nov 18, 2003 1:02 PM
Works for me 10x over {nmm}Mike Tea
Nov 18, 2003 6:38 PM
re: Crank length info link inside.Sean008
Nov 18, 2003 1:42 PM
The link works (try it)... Great info!

I am a very small rider and have been preaching the importance of proper crank length for years. Unfortunately, I have only found one company, Specialties TA, currently making shorter (and longer) cranks. This fall, they are releasing their Carmina line.

Specialties TA cranks are available from Sheldon Brown and Peter White.
TA cranksets in Canada...........Mike Tea
Nov 18, 2003 6:42 PM
......are available from Bicycle Specialties in Toronto. My TA rings for my new DuraAce crank just arrived today.

That store is owned by Mike Barry. Now WHERE did we recently hear THAT name? Well, his son Mike Jr, a member of Lance's US Postal team, just got 7th place in the world road champs for Canada. Go Mike B!
Be careful with this!Kerry Irons
Nov 18, 2003 4:59 PM
Note that despite numerous attempts, Zinn has been unable to come up with anything different than his original study, which basically showed no correlation.

It is generally the case that longer cranks make it harder to spin, and every increment of crank length is about 2-3 rpm. Going from 170 to 175 is about 5 rpm. Spinning is more physiologically efficient, all else equal.

You will find no high quality data to support any particular crank length as being better than any other. This is true whether or not you correct for leg length, femur length, etc. What little research has been done on crank length suggests that people adapt to different crank lengths and there is no optimum or formula related to body proportion. On the other hand, you will find lots of anecdotal or low quality data to support all kinds of conclusions, and more theories than you can shake a stick at. A rider's response to changes in crank length is 1) highly individual, 2) dependent on riding style and the event (TT, climbing, crits, track racing, etc.), and 3) most important, highly adaptive. This is why it is so hard to study the effect of crank length.

The short answer is: if it feels better and measures faster, do it. If it doesn't feel better but measures faster, maybe you should do it and hope to adapt. And even if it doesn't measure faster, you may adapt and get faster. Simple, eh? NOTE: measures faster means repeat timed distances on different days in different weather, not just "faster on my nightly ride" which can be masked by the effects of weather, fatigue, and the placebo effect of riding on "faster" equipment.