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Old 01-24-19, 04:40 PM
fietsbob's Avatar
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back of the envelope design ...

A scheme to add the flanges to a good commercially available sealed bearing pulley , like Tacx , sandwiched between them popped in my mind ,,
the flanges need not be part of the pulley to work as far as I can grasp the mechanics involved..

brass or oil bronze tubing can join the 3 pieces and slide along the pin in the chain tensioner.. as required.. & separate to do the occasional cleaning..

pulley can even turn faster than the flanges.. fixed to the bushing sleeve the bearing rolls around ..


Last edited by fietsbob; 01-24-19 at 04:45 PM.
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