|MT||Gear ratio and torque question|
Apr 3, 2001 11:24 AM
|IF the gear ratios are the same when using a 39 or a 53 tooth chainring (changing only the rear cogs) will the rider feel any difference in pedal force required to maintain a speed or accelerate. when everything is the same.
SAme crank same bike same rider.
|re: MT||grz mnky|
Apr 3, 2001 12:27 PM
|If I understand your question correctly you're asking that with the same drive ratio will there be any difference between using a 39 vs. a 53 up front? The answer is yes and no. No in the sense that since the drive ratios are the same then for all practical purposes the force/torque transmitted is the same. The no answer comes when you do a detailed analysis of a chain drive and realize that there is a littl e bit more ineffiency and loss when smaller gears are used. The chain is not a continuous belt, but rather a series of short segments with some very slight geometry changes as it enters and leaves the tooth of the gear. This is a very small difference and not likely to be noticed at the practical level. You could also have some loss if a high chain angle is used between front and rear gears, but this could happen in either chainring.|
|Grz mnky is right, smaller gears are less efficient in ...||jimbob|
Apr 3, 2001 3:40 PM
|transfering power for the same given ratio. Less friction I would guess. I dont know about the "high angle" thing grease monkey mentioned.|
Apr 3, 2001 12:57 PM
|Gear Ratios are NOT the same with a 39 and a 53. Therefore your question is moot.|
Apr 3, 2001 1:34 PM
|Does that mean that 1/2 is not the same as 50/100?|| |