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Anyone with long legs have experience with 180mm cranks(5 posts)

Anyone with long legs have experience with 180mm crankst-moore
Aug 18, 2003 11:23 AM
Thinking of making the plung to the Dura-Ace 180mm cranks. Anyone have recently changed from the 175's to the 180 cranks....Thanks
Unless you want to uprgrade save the moneySprint-Nick
Aug 18, 2003 11:37 AM
Ahhh the crank length debate.

My 2 cents on the topic is unless your looking at upgrading your cranks I'd recommend not to get longer cranks... even then I'd debate getting a different crank length. Basically your compensating for a 3% difference in leg length for every inch above or below a 32" inseam (I'll use that as average for arguement sake) with a 3% change for every 5 mm in variation from 175. So if your 34" inches you need 177.5 and 30 would need 167.5. And even then it doesn't take into account whether your spin or mash. Biomechanically unless a rider is competing at the very highest level and wants to try to squeeze a few more watts out at peak power or MAP it won't make a noticable difference... heck when I switch from my road to track bike with 5 mm difference I don't feel it and many people mirror this statement.

Cheers,
Nick
re: Anyone with long legs have experience with 180mm cranksIronbutt
Aug 18, 2003 12:07 PM
I tried them a couple of years ago. I found that I had difficulty maintaining a high enough cadence to respond to accelerations in the group. They were OK for time trials, but I just couldn't maintain a good, high cadence with them
re: Anyone with long legs have experience with 180mm cranksElefantino
Aug 18, 2003 1:36 PM
I don't know about percentages and leg compensation, etc., but I like my 180 cranks for flats; I actually prefer them to the 175s because I find I can maintain a high cadence but grab an extra 2-3 mph.

I use the 175s on a triple crank for the mountains.

FWIW,
Mike
Have to call BS on those numbers!Kerry Irons
Aug 18, 2003 5:03 PM
An extra 2-3 mph? Starting at 20 mph, that's a 28-44% increase in power! Just from 5 mm in crank lenght? NOT!!!! You're just kidding yourself. Where do you think you are keeping all this extra power that you suddenly can tap with a tiny increase in crank length?