Originally Posted by
badmother
Oki, but for now there is a MTB (biggest is 32t) at the back and 53, 42, 30 at the front and the total difference in teeth is not for the GS. I think if I make major changes (and keep a der setup) I`d go for two rings in the front instead of a corn cob in the back.
Guess I should ride it a bit more and make a note of what gears I actually use. Waiting for a new front 42 chainring at the moment. It was worn out and the new chain on it gave me a serious chainsuck several times on my last ride. Luckily no damage.
Yep ... I'd call it a MTB cassette. An 11-28 ... raising the bottom end by about 10% ... should take care of the problem if you don't need such a low bottom. (this is a NWT ... right?) 30t chainring to a 28 rear will be something very close to 20 gear inches.
If you're using it for touring and aren't looking for say a narrower crank -- lower q-factor -- my take is that you get very little from going to a double. There is still lots of 9-speed stuff around. It's cheap and durable.
Good luck!