4" x 2" Ironman Wheel - 2200 Lbs. Capacity4" x 2" Ironman Wheel The Ironman wheel is an exclusive compression molded compound, providing maximum strength and load capacity in a non metal material. It can easily handle sharp temperature changes, and the sturdy design is ideal for power towing applications. Tread & Core: Compression Molded Poly Compound Bearing: Precision Bearing W 1 2" Top Hat Bushings Capacity: 2,200 Lbs. Color: Black or Gray Durometer: Shore D 78 82 Temperature Range: 40F to