May 21, 201312 yr Why are you increasing or decreasing tooth so dramatically???? 1 tooth on the front is equal to 3 on the rear! 1 tooth at a time. On a 15t you would gain excelleration but shorten the gears and loose topend! I can't understand why you need to change the gear ratio so dramatic, also to consider you would have to remove chain links when dropping sprocket size that much Are you dropping the size because you think the front sprocket goes by 3's?? Front you can increase and decrease 1 tooth at a time Ken
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