If you want to go all out you can buy this set of 6.5 gram ceramic bearing carbon fiber jockey wheels for $65 Carbon Fiber Jockey Wheels with Ceramic Bearings 6 5g by Acer Racing | eBay I'm positive it will increase your bike speed to the speed of light. For $65 it ought to! Or you can go the cheap way and get this ceramic bearing aluminum wheel for $1.99 11TOOTH MTB Ceramic Bearing Jockey Wheel Pulley Road Bicycle Bike Derailleur Red | eBay You might not be quite as fast with the cheap one though.