Originally Posted by
stratman
I run nine speed triple on a road bike. I'm keen to future proof my set up, so have bought spare derailleurs, shifters. What I haven't stocked up on is spare cassettes (or chains). There are still some XT M770 cassettes available. They are about double the price of available Sora (HG50?) cassettes. Will they last twice as long? Or are there any other reasons to pay the extra? My rear shifts are perfect at the moment, on a Sora cassette with M772 RD.
Thanks.
Don't forget spare chainrings. Triples have fallen from favor.