OMG! PANDA COMIN' THRU!!!
Join Date: Aug 2008
Location: Las Vegas
Bikes: 1999 Diamondback Assault EX (slightly modified)
Posts: 31
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it's all in the math guys...
the key word... RATIOS...
quoting b3nsonX to give you a mathematical equation example,
" So going from 39/14 to 36/13, what is the total result?"
39/14 = 2 & 11/14:1 ratio, in generic terms this would be roughly at 2.79 freewheel rotations to 1 rotation at the crank (this will be shortened to "X"fwr : 1 cr in the future),
and 36/13 = 2 & 10/13:1, which would be a 2.77 fwr : 1 cr ratio
as you can see it's not much of a difference in ratio due to lowering both numbers on both sides...
sooo... if you want a more drastic increase in acceleration with a 14 tooth freewheel one should lower the chainwheel's teeth to the 36 tooth one instead of decreasing both thus making it a 36/14 ratio, equalling 2.57 fwr : 1 cr...
sure... it may not seem much, but lowering a ratio by .2 would mean less work to accelerate to top speed, BUT this will theoretically reduce your top speed...
to make it worthwhile though one should probably to go lower than that to make full use of your power on the street course, half pipe, or other such discipline... optimum would probably be, with a 14 tooth, 34 or 33 on these types of riding...
now apply these principles to the posted ratios...
