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172.5 vs. 175 cranks...(4 posts)

172.5 vs. 175 cranks...biknben
Mar 24, 2001 6:53 PM
I'm building a second bike and have an opportunity to get a used pair of cranks. I currently ride 175s but this new pair would be 172.5s. Is the difference really noticeable?

BTW: I'm a 6 feet tall.
can't say from *exact* experience, but...bigdave
Mar 24, 2001 9:37 PM
I can't imagine it'd be a big deal. I was going from 170s on spin bikes to my 175s on my road bike, and while there was a bit of a difference, I really only noticed it immediately after the transition, and even then barely. I thought the 175 would make my cadence feel loads slower, but they didn't.

My thought is that you'll barely notice at all, and any difference you do notice will melt away after the first 10 minutes.

--Dave
re: 172.5 vs. 175 cranks...ginsiengice
Mar 24, 2001 10:14 PM
I've been personally sizing rodies and tri folk for over 10 years....my answer to you is ... it depends on your riding style. It you are the average portioned 6'0 person you can go with either or but I have always pushed on the shorter side becuase it promotes smoother pedaling at higher cadence thus the legs not only will stay fresher but recover faster...I know it sounds like a small differece (2.5mm) but it actually makes a big deal especially if you are riding more than 175 miles a week!! Good luck:)
re: 172.5 vs. 175 cranks...mondo mike
Mar 25, 2001 2:54 PM
i'm 6-2 and run 172's on my road bike
167's on my track bike
and 175's on my mountain bike