Originally Posted by
Parva
So I bought the bike today for $5 without the 50% profit deal. However, now that I have it the rear gears wont shift. The front gears shift fine but the rear ones stay in fourth(or third I am not sure) gear, it won't shift up or down. Sometimes the chain will start to go up but then slips back down. What should I do?
First, check the cable. Quite often, the cable housing and/or cable is torn. If that's the case, check back here with specifics (what is torn and where). Also, check to make sure the derailleur can move (move it back and forth by hand). If all that looks good, try spraying the inside of the shifter with a good dose of WD40.