Prepare your semi truck to be Ready for the Road Ahead , with the Redneck Trailer Supplies 6.50" Hub and Drum Kit Assembly that improves the performance of the brake system. By combining a wheel hub and brake drum into one assembly, this replacement set is able to enhance braking alignment while also reducing installation time. Constructed with an oil bath to allow operators to check lubricant level without disassembling the hub. FleetPride is your First Click in Heavy Duty .