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Old 08-21-2010, 02:53 PM
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Kevlarr Kevlarr is offline
Motorized Bicycle Elite Member
Join Date: Jul 2009
Location: Mi
Posts: 1,628
Default Re: A new shift concept for the engineers....

Double tensioner yes but I don't think one top and bottom would work. You need to be able to so something with all that extra chain when it's running on the smaller sprocket and the best way to take up slack is an S.

Excuse the crudeness but what about something like this? Spring loaded on the center pivot so it can rotate to take up the extra slack.
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