Abstract: This is a portable exercise unit used in conjunction with a wheelchair that includes a frame, two rollers, and a tension control unit. The frame is adapted to fit over a wheelchair tire on one end and adapted to hold the two rollers on the other end. Each of the two rollers have a bearing in the center, one a non-directional bearing that is placed in the front of the frame and the other a clutch bearing that only turns in one direction placed in the back of the frame, and two axles, one for each roller with two washers on each axle. The roller assemblies are held in the frame with four clips. Also, within the frame there is a place provided for an adjustable tension control unit that includes an attachable felt pad.