Hot Rod Mini Bike carries a variety of parts and and upgrades for the Coleman CT100U Mini Bike. As with many of the other Mini Bike models being sold this bike suffers badly from being geared to high to negotiate hills or soft terrain. The HRM Jack shaft gear reduction kits and power up kits greatly improve this little bikes fun factor turning it into something the whole family can ride. The Coleman Ct100 frame is a bit more compact and cramped. It does not lend itself well to larger engine swaps. But with the addition of a Jack shaft and power up kit it will easily pull adult riders around at surprising speeds!