Advantages of the patented one-piece design, compared to ordinary wheels with separate bushing or journals, include lower profile and greater rigidity, largerdiameter fasteners for greater torque, less tolerance stack-up, external adjustment and tightening; and easier installation. The wheels come in carbon steel, stainless steel, and polymer overmolded stainless steel.

Bishop-Wisecarver Corp., 2104 Martin Way, Pittsburg, CA 94565, (888) 580-8272,