just bought a mtn. bike(diamondback response sport) a couple of months ago with the hopes of getting back in shape while doing something that i used to love as a kid. some of the guys that i work with ride road bikes and run a lot. they have talked me into doing a sprint triathlon in august. alright, that's the background, now on to the questions....i'm doing road training on my mtn. bike. i've looked around for set-up tips on the net and haven't found what i'm looking for. other than changing to rigid forks and slicks, what do i need to do? somebody suggested that i change the cassette, but i don't really know what would be worth my time/money to do. anybody out there done this before? any suggestions would be great.