BB length for Cook Bros RSR Cranks.

[tkboyle]

What's a good starting length for a set of these cranks.

Is it subject to each frame?

I'm only going to be running the two outer chainrings.

Ta.

 

[lewis1641]

mine is 122mm and works very well fitted to a kona fire mountain. i dont think the frame makes too much difference to be honest. you might get away with a bit less without the inner ring but i'd find out from someone who has that set up first or you could spend a fortune in bottom brackets!

 

[andy.l]

Yup,running a 122mm with mine

 

[stew-b]

mine needs a 127.5,i have a 125 and its too short on my amp

 

[dyna-ti]

mine was 122mm
Seems this is the general size :?

 

[Inigo Montoya]

What's a good starting length for a set of these cranks.

Is it subject to each frame?

I'm only going to be running the two outer chainrings.

Ta.

got my cbr rsr cranks (22-32-44) on a 127mm axle. but if you just use the outer 2 rings you might get away with something around 120mm.
you might possibly find some hints herre:
http://mombat.org/Cook_Bros.htm