Arctic Cat Billet 4 Wheel KitArctic Cat billet 4 wheel kit. This kit includes everything you need to add outside wheels to your procross skid. Includes a pair of billet fully 3D machined wheels, bearings, snap rings, billet 7075 aluminum wheel spacer hubs, and high strength hardware for mating to the OEM Cat axle or one of our billet straight axles. These wheels utilize an oversized 25mm bearing for strength and durability. Compatible with all tracks.