8" Forged Steel Wheel - 8000 Lbs. Capacity8" Forged Steel Wheel Forged steel wheels are drop forged from high carbon steel with a tensile strength of 60,000 PSI, making them our strongest wheels on offer. They are extremely tough and can withstand temperatures up to 1,200F. When you need extreme strength, this is the wheel for you. Tread & Core: Drop Forged High Carbon Steel Bearing: Multiple Bearing Options Capacity: 8,000 or 18,000 Lbs. Hardness: Rockwell 80 B Tensile Strength: 60,000 PSI