Crank Length
 

[Closed] Crank Length

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Hi,
I've been looking at cranks for my first custom build and was just wondering if there was a noticeable difference between running 170 mm and 175 mm cranks. If anyone can shed any light on the matter it would be much appreciated.
Thanks

 
Posted : 26/02/2012 11:25 am
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none, IMO

165 on my FS, 175 on my HT, 180 road bike - chosen for cost mostly

 
Posted : 26/02/2012 11:28 am
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172.5 don't feel as nice to ride as 170 for me. I'm quite particular about bike setup and feel though.

 
Posted : 26/02/2012 11:34 am
 LeeW
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I had 170mm on my MTB than swapped them out for 175mm when I upgraded.

The only thing I noticed was that I find it a little harder to spin as well as before, I'm sure I'll get used to it, I haven't ridden the mtb as much as I shoulg recently. 😳

 
Posted : 26/02/2012 11:41 am
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I've heard folk say 2.5mm difference is night and day. Usually the same folk that say 2.5mm of a headset spacer is also night and day.

I've never felt a difference, seems to me what you get in leverage you lose in larger stroke and vice versa.

 
Posted : 26/02/2012 11:52 am
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thanks very much! I will be ordering a 170mm slx set now! 😀

 
Posted : 26/02/2012 12:16 pm
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165 on one bike and 170 on the other and I notice going to 165 if I've been riding the 170's exclusively for a while but not the other way round. My knees don't like 175's if I ride long stretches of road where I'm sat down not moving around.

 
Posted : 26/02/2012 12:44 pm
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I was running 175's on my MTB before I started experimenting and in fairness, it's never held me back, but then I'm not spinning at 100rpm for 4 hours at a time on the MTB.

 
Posted : 26/02/2012 1:03 pm
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I couldn't tell you which of my bikes has the 170mm cranks and which has the 175.

 
Posted : 26/02/2012 1:24 pm