Abstract: A small utility vehicle, such as a motorized scooter, has an attached vehicle supporting wheel. This wheel includes a solid rubber or plastic tire removeably mounted to a central hub. The tire when mounted to the hub rolls on the ground at a peripheral ground contact surface and defines on opposite sidewall surfaces with the solid mass of the tire there between. Each sidewall surface has periodically spaced grooves. A vehicle attached brake of the compression caliper type having two flat opposing brake shoe surfaces bears on the tire sidewalls to effect braking. During braking, one flat opposing brake shoe surface of the compression caliper bears on one sidewall surface and the remaining flat opposing brake shoe surface of the compression caliper bears on the remaining sidewall surface squeezing the solid mass of the tire there between.

Abstract: A fluid coupling is combined with a one way clutch for the direct drive of a wheel from a small engine. The fluid coupling is mounted in cantilevered support or two ended bearing support from a small engine and has a small diameter inner driven shaft and a larger diameter out wheel driving shaft for contacting and directly driving a wheel. The inner driven shaft connects to a pump having a relatively larger outer diameter than either the driven or driving shaft. This pump is mounted on the opposite side of the driven wheel from the engine. The one way clutch is mounted between the inner and outer driven shafts and engages with only one direction of relative rotation between the wheel and engine. At any time that the speed of the engine is less than the current rotating speed of the wheel, the clutch engages.