SportRack SR4882 Roof Rack Mount Bike Carrier. The SportRack SR4882 Roof Rack Mount Bike Carrier lets you take your bike to those great outdoor trails safely without sacrificing space or scratching your car. The universal mounting system with large wheel trays holds bike securely during transit and allows the rack to mount directly to SportRack Roof Rack Systems, square, round and most factory roof racks. The fully padded, clamping jaw won't impact your bikeÆs finish and is compatible with just about any bicycle size and shape (BMX bikes, kids, womenÆs, hybrids, road bikes and mountain bikes). An adjustable arm holds down the tube of the bike for greater stability and locks are included to keep your bike securely fastened to the carrier so that it wonÆt slip or fall off your car. This rooftop rack measures 59-inches L by 8.5-inches H by 24-inches W. Limited lifetime warranty.