Longer/Shorter Cranks



Winter is kicking in up here in Northern Europe so mileage is as at an all time low at this time of the year... so I have a question: Do any roadies here use shorter cranks in the winter time when you're less fit, cycling a lot less, and using smaller gears?

I have 175mm on the racing bike which I'm on since February, but my hacker has 170mm. Should I keep them the same and try to keep my saddle position identical, or would I be inviting knee problems by alternating between the two size cranks when February comes around next year?

Interested to hear any comments or experiences if anyone does this.



New Member
Jun 5, 2002
I can't see any problems with using 2 different size cranks especially if it is during different periods of your training (ie. summer/winter). It is common for track riders to use cranks as short as 165mm while still doing road miles on bikes with cranks of 170mm-175mm. I have never heard of any problems to do with this as long as the seat height is appropriate.

I personally use cranks of 165mm for 3-4 training sessions per week and the 170mm cranks on my roadie for a similar 3-4 sessions per week during summer/track. I am not sure if this totally applies to your situation but it is the only info i can offer on the subject.

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