"Baja Crusher" wheels are made from Heat Treated 6061-T6 Spun Aluminum. They feature billet CNC machined 6061-T6 rings, flanges and centers. These are the strongest wheels on the UTV market. Cast wheels will typically crack or "Shatter" on impact due to cast metals being brittle and porous from the manufacturing process. Our wheels are drastically stronger than a cast wheel but if you do experience a sharp high speed impact they will bend and at least not shatter like a cast wheels. They also typically still hold air if bent letting you get home and not leaving you stranded on the trail! This is the reason racers prefer a non-cast wheel. Our bead-lock rings and receivers are the toughest as well as thickest in the industry at 3/8" thick each! Even with all the added material thickness and strength these wheels are still lighter than most cast wheels!