My chain has been randomly jumping lately. Tried adjusting shifters ad it seemed like it was ok but then out of nowhere when im at a steady pedal the rear will shift without me touching the shifter. I have had the bike for about 5 years now. Is it time to replace the rear cassette or chain? I do want to upgrade the shifters and derailiers but because money is tight right now I have to make do with the stock shifters.




