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Old 08-17-2014, 05:58 PM   #1
timeOday OP
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Joined: Jun 2008
Oddometer: 83
How many sprocket teeth is 8mm of chain adjust?

My 2003 KTM Adventure 640 has a reversible axle block (like in this thread except not broken) which, by reversing it, moves the rear axle 8mm without turning the adjuster threads.

I like the 16/42 sprokets on the bike just fine for dual sporting, but I am putting together a second set of wheels for dirt, the rear having no cush and knobbies, and would like lower gearing on that wheel (but I don't want to mess with the adjusters every time I swap).

So my question is, if I reverse the blocks thus moving the axle back by 8mm what size sprocket would the chain be adjusted for? 43t? 44t?

Arguably this is a 7th grade math problem but I'd rather just hear from somebody who has done it successfully.
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