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Crank size

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Old 10-24-09, 02:42 PM
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uppgrayed
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Crank size

Hey all,

Rebuilding my old mountain bike to ride to class. Its a 3 mile flat ride all the way there, so I am only going with 1 chain ring. Can you recommend a good sized ring for my new crank? I

Thanks guys
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Old 10-24-09, 02:54 PM
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48 as you probably have a 44 now. Could go bigger I suppose. Bolt circle pattern might be easier to find for your crank in the 48. Bear in mind that the rear cog's changes are more dramatic tooth per tooth.
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Old 10-24-09, 04:35 PM
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thanks!
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Old 10-24-09, 05:17 PM
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trekker pete
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And I thought this thread was gonna be about something else.

Never mind.
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Old 10-24-09, 09:04 PM
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I ride a road bike w/ 52t chainring, 11-32 mtb cassette and mtb rear derailleur. lowest gear is just enough to get up steep hills, and it rockets across flats and downhills. If you can push a bigger gear, I say go for it!
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Old 10-24-09, 09:12 PM
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Besides, you get bragging rights on this forum for big chain ring
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Old 10-24-09, 10:20 PM
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All I gots me is a little ol mountian CRANK, I wonder if that makes me a hillbilly.
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Old 10-25-09, 06:26 AM
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semperfi, that depends. Did you cook it yourself? How many teeth you got left? How many cases of Mtn Dew you go through in a week?

Of course all that makes a methhead, not a hillbilly...
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Old 10-25-09, 11:43 AM
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Originally Posted by Fremdchen View Post
Besides, you get bragging rights on this forum for big chain ring
if that was at me, it's not meant as a boast. it just makes the most sense to me to run the highest gearing you can, especially for a commute that's only 3 miles and flat. Since uppgrayed is changing things out now, might as well change to something you can "grow in to" (if you can't run that full range now, you will as you become a stronger rider)

if that wasn't at me, have a good weekend!
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Old 10-26-09, 10:27 AM
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I don't mean to sound like I'm getting personal, but are we talking the length of your crank, or chainring size..... I'm confused?
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Old 10-26-09, 09:43 PM
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Originally Posted by Kojak View Post
I don't mean to sound like I'm getting personal, but are we talking the length of your crank, or chainring size..... I'm confused?
I was thinking the same thing. but my question for the OP is, what do you have in back? multiple gears? or just one cog? If it's just one cog, then don't think about what's up front vs what's in back, just worry about the gear ration together. 20t in front and 10t in back (i've never seen a 10t, this is just hypothetical), is the same as 40t in front with 20t in back.

Since your commute is short, and flat, and you're riding a mt bike with smaller wheels than a roadie, i'd go with around a 3:1 to 3.5:1 gear ratio. So that every time you pedal your front crank one revolution, you're back wheel spins around 3 to 3.5 times. It's a decent mid-range.
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Old 10-27-09, 05:00 PM
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Hey guys;

I bought a new crank set with removable rings and I am going to start with a 42
( its what came with it) if its way to small, I can easily buy a larger one to go with it.
Thanks for all the advice
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