Rube home mechanic question. I got my wife power pedals for her road bike and am not feeling confident about the crank length. I’d appreciate if a more experienced wrench-hand weighed in. I look at these as 170 but the lack of an “mm” is throwing me off.
by bourgeoisiebrat
5 Comments
Definitely 170mm.
Can you scan the QR code on the crank arm? Maybe that will help.
https://preview.redd.it/9p4p6zvgfo9c1.jpeg?width=344&format=pjpg&auto=webp&s=e868bd0b4ffa2944fd01507fa9e8d768748c98b1
Fixed it for you. Definitely 170 mm
you could also measure them for yourself.
Another question is whether 170mm is the right length anyway. Bikes often come with cranks that are oversized for the frame, so people play this game of setting the seat low enough for downstroke but then have knees coming up too high.
For context, I am 5’8, 32in inseam, riding a 54 frame which came with 172.5mm cranks. Swapped for 165mm.