kahs Posted July 19, 2010 Share I was just wondering what the effect of an incorrect crank length is? I currently ride a 170mm on my road bike even though I should be riding a 172.5mm. Surely 2.5mm can't have too huge an effect though? Link to comment Share on other sites More sharing options...
Lucky Luke. Posted July 19, 2010 Share Longer cranks = more torque. If your cranks are too long your knees will probably let you know about it. If they're too short you're not using the full range of motion in your leg and probably losing a few watts in the process. Link to comment Share on other sites More sharing options...
Bos Posted July 19, 2010 Share I went from 172.5 to 175 on my roadbike, didnt notice it. maybe maybe slightly better up steep climbs, didnt notice it spinning in the bunch. Link to comment Share on other sites More sharing options...
Lucky Luke. Posted July 19, 2010 Share I went from 172.5 to 175 on my roadbike, didnt notice it. maybe maybe slightly better up steep climbs, didnt notice it spinning in the bunch. I went from 175 to 177.5 and I think I climb a bit better with the longer cranks, especially low cadence in the small blade.. obviously a personal thing though, depends on your riding style and how you're built. Link to comment Share on other sites More sharing options...
Johan Bornman Posted July 19, 2010 Share You have nothing to worry about. Go ride. Link to comment Share on other sites More sharing options...
kahs Posted July 19, 2010 Share Thanks, I'm thinking of changing to compact, so if I do I'll get the right size. Otherwise I just stick with what I've got Link to comment Share on other sites More sharing options...
ogrady Posted July 19, 2010 Share Is there a formula to work out you crank lengthIs the same formula used on road and MT bikes? Link to comment Share on other sites More sharing options...
Gumpole Posted July 19, 2010 Share I went from 170 to 175mm... couldn't notice the difference Link to comment Share on other sites More sharing options...
HeartCoppi Posted July 19, 2010 Share I had a 175mm on the LHS and 170mm on the RHS, and I noticed the difference.I'm not saying that its important for both cranks to be the same, because there are probably people who need two different lengths for anatomical reasons.I am saying that component manufacturers who dont give you the choice of specifying crank length on both sides, really should consider doing so.I've always loved this topic Link to comment Share on other sites More sharing options...
Big J-WP Posted July 19, 2010 Share How can you ride two different lengths does not make sence. If one leg is shorter than the other you need to build your cleat up not ride two different crank lengths. You can also take old stompies from the street to build the cleat up, makes for a nice smell while out riding. LOL Link to comment Share on other sites More sharing options...
Big J-WP Posted July 19, 2010 Share you can also google this topic and find there is formla's to work it out. I ride 180mm cranks on my road bike which suits me, but if I go with the formula I should be riding 220mm yes thats correct you can get these made for you. but I think that will be pushing it a bit. Link to comment Share on other sites More sharing options...
Kaos Posted July 19, 2010 Share Can I change the crank at the back on a tandem. My partner is shorter. Would the different length's help or matter? Link to comment Share on other sites More sharing options...
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