I've had the same Trek bike for 3 and a half years with ongoing shifting problems, but for the last 6 months I've had a litany of problems. My LBS is at their wits end.
Spokes are shearing regularly, the chain is jumping gears while not shifting and derailing when shifting, etc. This was going on before replacing anything, and is continuing after the following replacements:
- Several spokes replaced
- All spokes replaced
- All front and back gears replaced
- All spokes replaced again with the strongest ones the shop could get
- Chain replaced
- derailleurs cogs replaced
- derailleur replaced
- all cables replaced
I've had years of issues with gears not shifting correctly and chains jumping on both this and other bikes, so on that level it could be partially related to the way I'm riding (please advise), BUT this is a whole other level. I put a lot of power into my ride and push hard uphill in hilly terrain, though I'm not sure if or to what extent that would impact this.