SRAM E-Tap - Center cassette gears clatter
I installed an E-Tap shifter / derailluer system on my bike a few months ago and I was amazed at how perfectly it worked and how easy it was to set up and install. Each shift was spot-on and noise free (well, the front derailluer made a bit of noise when the chain went to the big ring but that was normal, not an issue).
Now, with several thousand miles on the bike, the shifts on the middle cogs of the cassette are "imprecise" i.e. a lot of clattery noise coming from them. Note that on the lower (bigger) cogs and the higher (smaller) cogs there is no noise.
Noise is pretty much the same in the middle cogs regardless of which chain-ring I'm in.
I'm thinking it might need to have the chain replaced but at 3,000 miles (approx.) it seems a little early for that. Oh, and my Park chain wear checker says the chain is still good. Chain and all components are SRAM.
I've never heard of any "interior" adjustments for a derailluer, only high and low gear stop bolts.
Please advise!
Rick / OCRR