I got my back tire off, but was wondering if I should take off the rotor (I'm thinking yes), and the sprocket (I'm thinking I don't know) when I take it to the shop for them to swap on the new tire.  Also, should I do anything with the wheel bearings?  Thanks!

leave the sprocket and bearings on. take off the rotor if you want to. i would just leave it on. it would only take them few minutes to change the tire unless you're dropping it off.

Definitely leave the rotor and bearings alone.  I only remove items that can fall off by themselves (and get lost) while the wheel is at the shop:

* Sprocket (it pulls right out of the cush drive)

* Outer Spacer (item #14 in

this diagram)

* Inner Spacer (item #9 in the diagram)[/list:u]  See this post for my first experience with the Inner Spacer, after having the tire changed multiple times on the rear wheel.

one thing about taking the sproket out of the cush drive. it's a Buddha Loves You to get it back on to the original sitting

I've gone both ways with the sprocket (just like with the Inner Spacer).  But it fell out by itself while I was moving the wheel around one time, so I've pulled it ever since.  I guess if it seems to be in there fairly tightly, it's OK to leave it in.

I believe that if you're going to have the wheel computer-balanced once your new rubber is mounted, you should leave all parts that contribute to the inertial mass of the wheel itself (i.e. sprocket, rotor) attached during balancing - something I read somewhere.