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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 01-26-06, 07:30 PM   #1
tacofreedom
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Noob question? (Crank length)

I am a Noob to fixed gear cycling and was wondering if your crankarm length should be the same for you fixie as it is for your roadie?
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Old 01-26-06, 07:35 PM   #2
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depending on your bottom bracket height you may get away with 1700mm's. but if you choose to ride a little more aggressively, like pedaling through tight corners try 165 mm cranks in order to avoid pedal strike.
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Old 01-26-06, 07:45 PM   #3
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It all depends on the BB shell height and if it is a converted road frame or a track frame; even here clearance can vary. I run 170's on my track bike and have never come close to striking a pedal. If you have a conversion w/ semi horizontal drop outs the further back in the dropouts you position the axel the lower the BB shell height will become. Obviously a track frame is not subject to this problem. All I can say is measure, measure, measure and then measure. I don't like to be limited by my ride so screw riding conservatively because of mechanical limitations. I would def. recommend 165 for a conversion and would never hesitate to run 170 on a track frame. MTC.
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Old 01-27-06, 09:47 AM   #4
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I ride a conversion that has the BB center 29cm off the ground, so 170mm cranks work fine for me. The only time I can get pedal strike is if I turn hard and there is a wide gutter on the corner as well that drops the wheels lower. My other bike has 175mm and I am glad there is not a huge difference.

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Old 01-27-06, 09:49 AM   #5
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Yea. I had 170mm cranks on my first fixed (conversion) Corners sucked. Stick with 165's
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Old 01-27-06, 09:51 AM   #6
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Doesn't matter if you're using Sugino RDs
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Old 01-27-06, 09:56 AM   #7
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Quote:
Originally Posted by $0.00/Gal
Doesn't matter if you're using Sugino RDs
yeah it does. pedal strike is when your pedal hits. having a little extra nubbing on your crank ain't gonna make a diff.

anyway to the OP. some people ride 170's, some people 165's. some people have high bottom brackets, some people, low.
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Old 01-27-06, 09:57 AM   #8
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yeah cause it's the crank strike that'll kill you with those
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Old 01-27-06, 10:00 AM   #9
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hey, you never know, especially on the 1700mm cranks that stendhalien mentioned.
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Old 01-27-06, 10:01 AM   #10
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i use 170mm's on my conversion with MKS sylvan track pedals, i've never struck
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Old 01-27-06, 01:20 PM   #11
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i've got 170s on my conversion and i think about it every time i turn. hasnt happened yet though.
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Old 01-27-06, 01:27 PM   #12
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I ride 172.5's on a converted road frame and take fast corners. Haven't struck yet in a couple years on this bike.
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Old 01-27-06, 01:34 PM   #13
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I run 170s and have only had pedal strike once, and I was banking like a crazy person. The strike was almost heard more than felt.

IOW, sort of depends on your specific circumstances.
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Old 01-27-06, 01:39 PM   #14
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170's on 2 conversions. ride like a suicidal dumbass most of the time. haven't ever had a pedal strike.

take that for what it's worth.
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Old 01-27-06, 02:27 PM   #15
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Conversion w/ 170s = no pedal strike for me. Cranks are original to the 60cm Raleigh frame. I use eggbeater pedals, which have a pretty short profile. I haven't measured my bottom bracket height. I am tall and I like longer cranks.
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Old 01-27-06, 02:35 PM   #16
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175 on my conversion. only stuck a pedal once - turning while going down a steep ramp.

get narrow pedals.
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Old 01-27-06, 05:10 PM   #17
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Quote:
Originally Posted by queerpunk
hey, you never know, especially on the 1700mm cranks that stendhalien mentioned.
hahahaha. damn it took awhile for people to notice...just picturing 1700mm cranks makes me laugh my ass off out loud and gives me little giggle fits.
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