Professor Skid has answered...  

Question by: Matt  23/08/2011 00:14:27 
Question: Skid, I'm not sure about gearing ratios! Is it correct that a larger pinion and smaller spur means more top speed? Cheers.
 

The wise one answers:

That's correct. It's the ratio of spur to pinion, if the spur is 75T and the pinion is say 15T then the ratio would be 5:1. Make that ratio larger with a bigger spur and/or smaller pinion and you get less top speed and more acceleration. The opposite is true if you make the ratio smaller with bigger pinion and/or smaller spur.
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