US Patent 9295894 Light weight portable bicycle rollers

A bicycle rollers device, having a frame that includes a rear mounting assembly for two rear rollers; a front mounting assembly for a front roller; support elements, for supporting the frame above a surface, upon which the support elements are set to rest; and a central bridge connecting the front mounting assembly to the rear mounting gear. Also, two rear rollers are mounted in the rear mounting assembly and a front roller is mounted in the front mounting assembly and defines a roller width. Finally, the central bridge is more narrow than the roller width, thereby permitting a bicycle rider to mount and dismount a bicycle set on the rollers without encountering the central bridge.