Crank Arm Length

FOAD
FOAD Posts: 318
edited August 2009 in Road buying advice
I am about to upgrade the compact on my Cube Agree 60cm bike to a double.

I am 6'3" with a 32" inside leg.

My current crank length is 172.5, and I have zero knee or other problems with it. My LBS (who are fitting but not supplying the new crank) reckon I should go for a 175 length.

I am concerned that the extra 2.5mm may be cause issues I don't have now. Is 175 excessive for such relatively short legs on a tall bloke?

Comments

  • ACMadone
    ACMadone Posts: 300
    I've got a 32" inside leg and ride 175mm cranks. I puposely chose to swap to that length when I bought a new groupset and haven't had any problems. Have the LBS got a 175 that you can try?
  • snedden9485
    snedden9485 Posts: 57
    Both my bikes have 175 cranks. I am 183cm tall, not sure of inseam. I dont have any knee dramas.
    2009 Cervelo S1
    2008 Specialized Allez Elite
  • dinosaur
    dinosaur Posts: 86
    Peter White recommends (second hand) "18.5% of the distance from the top of the femur to the floor in bare feet should be the crank length". It works for me.

    http://www.peterwhitecycles.com/fitting.htm
  • Wappygixer
    Wappygixer Posts: 1,396
    I'm 5'11 and I use 175 and170 depending on which bike I'm riding.
    I can jump onto either and cant feel any difference
    I would say for your height 175-177.5 would be the ideal

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