Bike Forums - View Single Post - Road Bike won't back pedal in certain gears
Old 03-04-18, 07:35 PM
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What is the size of the largest sprocket (number of teeth)?

Is the B-tension screw all the way in? That would be an extreme, but you should have enough adjustment in that B-tension screw to get the derailleur angled back enough so that the top pulley doesn't contact the largest sprocket on the cassette. If you're truly out of adjustment on that screw, and you still have interference (you should hear some noise as well), then it sounds like something could still be amiss.

I wouldn't consider this "normal". It may be okay and not cause any performance issues, but I would be surprised if this is the way the bicycle manufacturer intends for it to be.
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