Looking for some pointers/help.
I recently measured chain and was shocked to see that after 8 months and 3000km the chain has stretched to over 1%. I replaced the chain, and when out riding I started to get terrible chain slip (not slipping up and down the gears) but riding over, i think the cassette. Prior to the chainswap I had no problems, hving been out in strong winds and pedaling hard.
I thought the cassette might also be worn or the pawls so checked with three other wheels and cassettes, still same problem. Thought it might be a duff chain, so changed that, no difference. Thought on the off chance that all cassettes were worn, so bought new one (slowly, buying new groupset part by part here). I had a look at the front small chainring and it looks slightly worn but not bad. The slip only occurs when I am in the small chainring at the front and the 4-5 smallest gears at the back (yeah i know I shouldnt be crosschaining)
Could worn jockey wheels cause the chainslip? (these are even newer about 7 months and are Hope jockey wheels) or is it more likely the front chainring. Options left are new derailleur or chainring.
An thoughts greatly appreciated.