I say buy some slicks. They're cheap and will improve the performance of your mountain bike greatly when your on roads. I'm running some cheap kenda slicks on mine since I crashed my road bike. They are easy to switch for when I want to go offroad (just like changing any other tire). You could buy new wheels, but thats kind of expensive and it doesn't take much time to stick on your existing wheelset. They make a great deal of difference, and I can still keep up with my friend on his road bike.
Last edited by mrchristian; 07-17-05 at 03:57 PM.