- 170 to 175?
6’1″ – i run 175 on other (road) bikes, it’s the pedal/crank strike i was wondering about.. seems such a small difference though!
i do have fairly chunky flats on, so i could probably eliminate any cornering differences by getting some slightly smaller pedals.. i do smack rocks straight below sometimes, but tbh that’s probably due more to poor technique than 5mm yeah?Posted 6 years agostumpy01Member
sugdenr – Member
I smack my pedals loads with 175s, put it down to low BB. Do you really notice the 5mm difference on pedal strikes with 170s?
Yep. Always used to whack my pedals on my old Stumpjumper with 175mm Specialized cranks.Posted 6 years ago
Bought a replacement XT crankset & it was £10 less to get 170mm cranks. Didn’t really notice any difference to pedalling, apart from I stopped whacking my pedals all the time.nealyMember
Apparently the correct crank length can be calculated as per below
“One writer in a major magazine article quite a few years ago claimed that after considerable testing with many different riders, 18.5% of the distance from the top of the femur to the floor in bare feet should be the crank length. You can find the top of the femur pretty easily. It’s 5″ to 6″ below your hip bone, and moves rearward when you raise your knee.”Posted 6 years agomattjgSubscriber
I think I do, especially on a very bumpy trail with lots of fast power-spins. (My new bike has 170s my older bikes 175s but I’ve never tried them side-by-side on the same bike).
Most new bikes come with 175s. If you think about it it’s daft that a 5’6″ person and a 6’+ person ride the same cranks, it’s got to be wrong for at least one of them.Posted 6 years ago
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