Some good lightwieght rims like Marcesini.
(I think I spelled it right)
The wieght reduction to the rear tire will give you almost as much HP gain, to the tire,
plus make the bike more nimble.
An added bonus is that they retain their value better than the other parts.
If you go to sell the bike, put the stockers back on and sell the rims seperately, you'll almost get your money back.
[This message has been edited by Lofty Abuse (edited 27 July 2000).]