Question about Trek 4300 Disc
Your gears are not synced. Simply log onto shimano.com and look at their help and maintenance section for very good diy video.
Posted on Feb 20, 2015
Needs a gear adjustment hopefully. it might have a stretched chain along with worn cassette teeth. if you have ridden alot of miles in the smaller gears in the rear you might have worn them out. you would have to replace chain and rear sprockets/cassette
Posted on Nov 12, 2013
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Posted on Jan 02, 2017
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