HPU was one of the first companies worldwide that specialized in 1980 on the fabrication of big-wheel-kits. So today HPU is naturally one of the most experienced companies on this sector. Countless HPU swingarms and big-wheel-kits are on the road today - worldwide! Nothing changes your bikes´ design as much as the installation of a big-wheel-kit. We offer all variations of big-wheel-kits for nearly all models. Here you find various kits. Please choose:   Twin Cam from 08 up Twin Cam from 07 up Twin Cam 00-06 Evolution up to 99 Shovelhead Dyna V-Rod Please have a look at the bike-gallery and see the high quality of the customized bikes.