Crank arm length

[wolf182]

evening

 

 

 

i am new to cycling and got myself a rc6000 '08 model, m size with a std 105 group set.

 

i am looking to test a compact crank but not sure about the crank arm lenght's.

 

 

 

my current bike has the 172.5, will it be advisable to take a 175mm with the compact crank ?

 

 

 

please advise.. thanx

[Guest Agteros]

Dunno, but I was always under the impression that it is a function of leg length (more specifically lower leg...), but have a look at http://www.machinehead-software.co.uk/bike/cranks/cyclist_crank_length_calculator.html

 

#include std_disclaimer.h /* There might be more, or/and better info out here and there

 

[wolf182]

thnx Agteros, i have been reading up online now and there are alot of different opinions out there.

 

what i mostly realised now was that there is much more to it that what i first thought.

 

i think ill get some quotes from shops tomorrow and also ask there opnion, for now i think as i am comfortable on the the 172.5, i should probably keep that lenght.

[wolf182]

using that calculator u sent me actually worked out to 173mm, which is close enough to 172.5mm

 

 

 

thnx

[Johan Bornman]

Forget about the crank's length. You won't notice any difference. If the 175mm crank is on the bike you want, that's the bike for you.