I typically ride 100-120 miles a week commuting, in nasty weather this time of year. I have a park chain checker at home and replace my chains at the 0.075 mark. A chain typically lasts me 2 months before the chain checker tells me its stretched/worn out. My problem is that every 2 or 3 chain changes, the new chain starts skipping and I need a new cassette too. The point of frequently changing the chains is to prevent wearing out other parts of the drivetrain, but I'm still going through a lot of cassettes. The chainrings are not visibly worn out that I can see.
Does anyone else have this problem?
I have a standard road triple in front and run shimano 8 speed 11-30 cassettes in back, and I have been using SRAM 8 speed chains.