Originally Posted by Lenton58

If the STX RD is anything like some other STX stuff I've got on my old Trek 930, it will work just fine as long as its not worn out. I always thought that STX was pretty good kit. Just clean it up, drop some Triflow on it and ride it. If it's flakey, you should easily find some Deore around that's OK. I used an Alivio RD for untold miles for nearly 15 years. It was a treat until it needed new jockey wheels and some other tiny kit-bits still in the Shimano catalog. Looks good to go for another 15 years. And STX, I believe, was up the scale from Alivio!