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Old 2007-09-03, 11:59 PM   #1
ulyssesnitrate9
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Cranks? Explain Please.

Well, people seem to be talking about various crank lengths and I'm just curious as to what that's all about? What are the pros/cons of having longer/shorter cranks?
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Old 2007-09-04, 12:19 AM   #2
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Quote:
Originally Posted by ulyssesnitrate9
Well, people seem to be talking about various crank lengths and I'm just curious as to what that's all about? What are the pros/cons of having longer/shorter cranks?
Longer cranks give you a bit more torque, increasing stability. For steep uphills and downhills and trials riding, longer cranks are usually prefered. Shorter cranks are faster however. They are also capable of spinning much faster for street riding. Many distance riders and most street riders use shorter cranks.

Thats a pretty brief description, but I hope that helps a little.
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Old 2007-09-04, 12:44 AM   #3
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Look at it as the crank being a leaver.
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Old 2007-09-04, 12:49 AM   #4
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Here is a picture to show why longer cranks are better for trials.

Last edited by wickedbob; 2007-09-04 at 12:52 AM.
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Old 2007-09-04, 08:55 AM   #5
feel the light
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crank length controls pedal speed

The shorter the crank, the slower the pedal will move at any given MPH. That means your foot doesn't have to kick as fast, to put power into the pedal, as it would have to if you were using a longer crank. Of course, mechanical advantage is reduced with the shorter lever.
It is wrong to think of crank length as gearing. We are stuck in one gear. So we fuss about crank length, trying to make the best of it.
Sadly, the 10 speed unicycle , or even a 3 speed, doesn't exist.
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Old 2007-09-04, 09:03 AM   #6
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Quote:
Originally Posted by feel the light
The shorter the crank, the slower the pedal will move at any given MPH. That means your foot doesn't have to kick as fast, to put power into the pedal, as it would have to if you were using a longer crank. Of course, mechanical advantage is reduced with the shorter lever.
It is wrong to think of crank length as gearing. We are stuck in one gear. So we fuss about crank length, trying to make the best of it.
Sadly, the 10 speed unicycle , or even a 3 speed, doesn't exist.
1) So would that mean that a 175mm crank on a MUni is better then 150 or 125.
2) Wouldn't that be a schlumpf unicycle???
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Old 2007-09-04, 12:50 PM   #7
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schlumpfs only have one gear. Well i mean one non 1:1 gear ratio.

and 175 cranks on a muni would give you loads of control and be easier uphill and stuff, but you would be really slow.
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Old 2007-09-04, 01:35 PM   #8
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Quote:
Originally Posted by Hazmat
1) So would that mean that a 175mm crank on a MUni is better then 150 or 125.
[B][COLOR="Blue"]
Well dependent upon what sort of terrain you are riding. It's mostly about personal preference.
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Old 2007-09-04, 01:38 PM   #9
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Quote:
Originally Posted by brendan
schlumpfs only have one gear. Well i mean one non 1:1 gear ratio.

and 175 cranks on a muni would give you loads of control and be easier uphill and stuff, but you would be really slow.
1) Really, i didn't know that considering you can adjust the speed and whatnot. Well there you go, i learn something new everyday,
2) Yeah i guess, but i think 150s would be a good choice too also.
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Last edited by Hazmat; 2007-09-04 at 01:38 PM.
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