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Pro Crastinator
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11,059 Posts
Discussion Starter #1
i've got a 40t front ring on order, and am making chainguide plates to fit it, so i need the diameter of a 40t ring with a chain wraped around it. i'd like to have the plates made by the time the ring shows, so i can just bolt it up and go. any help from you cats would be greatly appreciated......
 

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Pro Crastinator
Joined
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11,059 Posts
Discussion Starter #4
actually, are you sure it's 7.75"? after i draw up a template, that seems rather large for a 40t......

who is running the mrp slalom guide? what is the O.D. of that.......
 
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