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Crank Length

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Crank Length

Postby CoffeeNut » Mon Jun 16, 2008 9:31 pm

Just noticed I have 170mm cranks on my Shimano 105 53/39

Is 170mm typical? Thought 175mm was more common ??
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by Forum Ads » Mon Jun 16, 2008 9:33 pm

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Postby nzdans » Mon Jun 16, 2008 9:33 pm

170mm is the common size for road bikes as it promotes spinning more. The common size for MTBs is 175mm...
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Postby Kalgrm » Mon Jun 16, 2008 9:34 pm

If you've only just noticed, don't worry about it. ;)

Cheers,
Graeme
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Postby nzdans » Mon Jun 16, 2008 9:45 pm

Sorry, am multi tasking (on marathon call with Mum), what size frame do you ride, how tall are you?
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Postby CoffeeNut » Mon Jun 16, 2008 9:51 pm

Doing a lot of hills up here in Toowoomba. Contemplating compacts or a triple - so was measuring up some options.
I'm 173cm short, and frame is 52cm Trek - seems to fit well.
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Postby 531db » Mon Jun 16, 2008 10:27 pm

CoffeeNut wrote:Doing a lot of hills up here in Toowoomba. Contemplating compacts or a triple - so was measuring up some options.
I'm 173cm short, and frame is 52cm Trek - seems to fit well.


If your leg length is in proportion to your height of 173cm, 170mm is plenty long enough.

531db (184cm and 165/170mm 'cranker').
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Postby Parrott » Mon Jun 16, 2008 11:29 pm

Have a go at this site.
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Postby CoffeeNut » Tue Jun 17, 2008 8:25 am

calculator says 163mm would be ideal.
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