Originally Posted by
Easy Peasy
Have a trek 7300 that's my daily commuter, just came back from a tune up at the LBS.
I'm pedaling along and once in a while it feels like there's no resistance. I'm also experiencing occasional ghost shifting of the back derailleur. Any ideas? Are these related? Thanks.
EP; It is probably a 5%, but suggest may want to confirm that the rear gearing is not a free wheel instead of a free hub. If it is free wheel and it is not tightened properly, it will tighten on sort of randomly when you put pressure on it. The feel would be about what you describe. I once had a LBS slip on a new wheel (from very old stock) to replace the one they bent when tripping over some shop clutter. I almost didn't catch it.