larger cog & chainring vs smaller
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larger cog & chainring vs smaller
Is there any advantage using a large chainring + large cog over a smaller chainring + smaller cog when setting up a given gearing?
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The only advantage I can think of is with the bigger chainring / bigger cog would be that the chain has MORE teeth to engage on, which might make you feel more secure knowing it has less of a chance to fall off. Another advantage perhaps is weight for the weight weenies.
Chad
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a small set-up will be lighter but will wear out quicker. a big set-up also makes you tougher even if it is the same ratio. I used to ride 39x15 (69") and never got any action. now that I ride 52x20 (69") I get more action than Ice-T.
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Bigger chainrings/cogs will spread out the wear over more teeth theoretically.
But mostly big chainrings just look cool.
But mostly big chainrings just look cool.
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Originally Posted by potus
a small set-up will be lighter but will wear out quicker. a big set-up also makes you tougher even if it is the same ratio. I used to ride 39x15 (69") and never got any action. now that I ride 52x20 (69") I get more action than Ice-T.
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Originally Posted by lz4005
Bigger chainrings/cogs will spread out the wear over more teeth theoretically. ...
Jim
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Originally Posted by jimshapiro
I don't think so. Each time the back wheel makes a complete revolution all of the teeth on the cog have "done their job" once, whether there are 15, 17, or even 25 teeth (same logic holds for the chainring, with a factor for the gear ratio). It seems to me that the chain is what gets a bigger workout with larger gears. You've engaged and disengaged one revolution's worth of teeth and that could be 15, 17, or even 25 chain links. No?
Jim
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Aren't smaller cog's technically less efficient? I think I remember reading something to that effect...
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Originally Posted by Fugazi Dave
Aren't smaller cog's technically less efficient? I think I remember reading something to that effect...
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would skid patches play any part in this, perhaps?
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Originally Posted by lz4005
Very small cogs can start introducing more drag from bending the chain around a smaller diameter. Not to mention that it is easier to throw the chain with fewer teeth engaged at any one time.
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For a given force on the pedal, there's more tension on the chain with a smaller cog.
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Originally Posted by genericbikedude
Small drivetrains look cool. I used to rock 39x13.
You buttwad.
You buttwad.
yeah I used to think that you generic buttwad turd brain, but really look at it.
#18
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larger seems to pedal easier, smoother - it feels better
and I think 1/8" chain feels better too - I use it on all cog/ring combos
and I think 1/8" chain feels better too - I use it on all cog/ring combos
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I ride 53X19.
Subjectively, the same gear inch seems easier with a bigger cog and chainwheel combo.
I also like the way it looks.
Subjectively, the same gear inch seems easier with a bigger cog and chainwheel combo.
I also like the way it looks.
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I like to use a smaller wheel for added ground clearance,so I can climb over logs and rocks better