2

I am interested in getting a left-side power meter for my road bike. It has Shimano 105 components. I'm considering a 4iiii Precision left-side crank, in a 105 or Ultegra version.

I looked, and don't see the size of my current cranks marked anywhere. How do I measure them? Is the distance the total length of the crank, or the center-to-center distance from the bottom bracket to the pedal spindle?

1 Answer 1

5

It's the center-center distance, but it should be stamped on the inside of the arm.

4
  • Adam, thanks for the reply. Will it be stamped on the inside of both arms, or just one? And where on the inside, exactly? I looked and didn't see it. (I have a Wahoo cadence sensor on the inside of the left arm. It's possible it's covering the stamp.)
    – Duncan C
    Jan 1 at 2:19
  • 1
    Ah-ha! I went back and looked more closely and found it. It seems my cranks are 172.5 mm. Thank you!
    – Duncan C
    Jan 1 at 2:25
  • For others' reference, here's another question that shows where the length is stamped. bicycles.stackexchange.com/questions/67619/…
    – Weiwen Ng
    Jan 2 at 14:46
  • Thanks for the answer. I did eventually find the crank length info printed on the crank.
    – Duncan C
    May 7 at 23:50

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.