I have a Specialized Sirrus that has a Deore LX Derailleur which is a 9 speed. I also have a Trek 4500 with Alivio Derailleur which is an 8 speed. I was thinking about upgrading the LX on the Sirrus with XT and putting the LX on the Trek.
The LBS I bought the Sirrus from said that is doable, however the LBS I bought the Trek from said it isn't. So my question is which one is correct and which one isn't? Also is it worth my money to upgrade if they are working ok?
I am not having any problems with the Sirrus and really the only thing with the Trek is chain slap and that is only when we are going down hill on a very bumpy trail and fairly fast.
As usual Thanks for all of your advice...