brent wrote:
9 speed sram shifter with 8 speed sram derailleur.
will this work?

It should be OK, as long as you're using a 9-speed cassette and chain.
You might also need a new crankset for the thinner 9-speed chain.

The overall width of the 8- and 9-speed cassettes are the same; it's the
spacing that's different.
--
Russ --kill the wabbit to despam
"And here you thought the worst thing you could do was pee on
the third rail." -Cecil Adams