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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 07-08-08, 07:39 PM   #1
iammbox
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recomended crank arm length?

as the title says. 170mm,165,mm or 160. i have no idea. mostly gonna use the bike for commuting. whats the difference? thanks in advance
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Old 07-08-08, 07:57 PM   #2
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i would say 165, i'm running 170 right now and wish they were a lil shorter.
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Old 07-08-08, 08:20 PM   #3
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how tall are you? how fast will you ride? how hard do you corner? how hilly is the route?

short arms favor shorter legs, high rpm spinning, cornering clearance, and less leverage.
longer, the opposite.

i have fairly short legs (29" inseam), ride 20mph +/- 5 in rolling hills, and watch my corners. i started with 165 and moved to 170. i like the extra leverage, upped my gear one tooth to slow the spin and take advantage. have yet to strike a pedal, but do try to keep the bike more upright in the corners.

$0.02.
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Old 07-08-08, 09:23 PM   #4
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170's.

165 is for higher cadence / spinning. I had 165's (ride a 54cm, 5'9, 32" inseam) and like the 170's a lot better.
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Old 07-08-08, 09:51 PM   #5
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ahh i see. thanks for all the info and help
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Old 07-09-08, 08:22 AM   #6
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I have a 65 on the right and a 70 on the left!
its awesome....nooot
but hey I gotta use what I got
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Old 07-09-08, 08:29 AM   #7
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I have a 65 on the right and a 70 on the left!
its awesome....nooot
but hey I gotta use what I got
o.O
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Old 07-09-08, 09:40 AM   #8
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o.O
lol +1

I have 170s on my Rob Roy, have yet to strike a pedal, but have ground/scratched up the crank ends with bad pedal position going over obstacles (oops... beausage?). Seem to work nicely for me, I can still spin upto 120/130 usually no problem, higher than that is a rare effort
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Old 07-09-08, 08:06 PM   #9
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Compromise with 167.5
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Old 07-09-08, 08:46 PM   #10
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Anybody running 175's? I have a 35" inseam and I wonder if 170's would be long enough.

???

Any thoughts?

PF
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Old 07-09-08, 09:09 PM   #11
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pedal strike sucks. 165 is ideal
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Old 07-09-08, 09:11 PM   #12
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Anybody running 175's? I have a 35" inseam and I wonder if 170's would be long enough.

???

Any thoughts?

PF
I have 175s on my FG cross bike. I have yet to have any issue in a race, or otherwise. If you're tall... 175s are the way to go.
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Old 07-09-08, 09:15 PM   #13
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pedal strike sucks. 165 is ideal
If you have an actual FG you don't have to worry as the BB is almost as high as a mountain bike... if you're riding some road conversion, pedal strike is more of a threat.
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Old 07-09-08, 09:59 PM   #14
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Cool.

Quote:
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If you have an actual FG you don't have to worry as the BB is almost as high as a mountain bike... if you're riding some road conversion, pedal strike is more of a threat.
62cm. IRO Mark V. I think I will stick with 175's.

Many Thanks,

PF
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Old 07-09-08, 10:04 PM   #15
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I have some FSA Vero which are like 173.5 or some **** like that


I really want 165's to see what spinning is like w/ the shorter crank arms
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