So currently I'm running stock front sprocket chain and rear sprocket, front is 17T, rear is 40T, I'm thinking about going 42T in the rear and 16T in front. That being said what's my top speed now? Also if I loose that much top speed what if I leave front 17 rear 42. Or rear 41 front 17. Just to trying to get a idea. PFA my bike.
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