Originally Posted by TCR Rider

I'm wondering how many miles you should be getting out of a Dura Ace 9000 11 speed cassette. The reason I'm asking is that I just replaced the chain and started to get some slippage on the low end of the cassette while in the small chainring. I'm running DA Di2 and it really doesn't require much adjustment but I checked it out anyway.
I'm thinking it might be the cassette which has a little over 3500 miles on it. Does that sound like it's in the ballpark?