Rear Brake Disc for Hammerhead Mudhead / 208R / 80T Rear Brake Disc for Blazer 200 and Mid-series Gokarts from Trailmaster Rear Brake Disc for Maruader and other mid-size gokarts from American Landmaster Brake Disc for TrailMaster MB200-2 Mini Bikes. 7 1/4" Diameter center hole is 2 5/16", 4 bolt pattern is 3 1/8" 5/32" Thick Hammerhead part # 8.010.201 American SportWorks part # 14670 Trailmaster part # 8010201080G000 Trailmaster part # 54007-YL