EQUIPMENT DESCRIPTION: HI-SPEC WHEELS, PART NO. 356655, USED IN COMBINATION WITH DEXTER AXLE (6) BOLT BRAKE DRUMS MANUFACTURED BETWEEN FEBRUARY AND OCTOBER 2000. A DESIGN CHANGE WITH THE BRAKE DRUM RENDERED THEM INCOMPATIBLE WITH CERTAIN CAST ALUMINUM WHEELS PRODUCED BY HI-SPEC WHEEL & TIRE COMPANY. BRAKE DRUMS USED WITH THESE WHEELS DO NOT PROVIDE SUFFICIENT MOUNTING SURFACE AREA FOR SUPPORT OF THESE WHEELS.