Martins Truck Wheel Dolly. Handles Heavy Truck Tires with an Overall Diameter Between 36" and 48". Solid Steel Rollers for Easy Tire Rotation. Large Heavy Solid Oversize Tires for Easy of Running Over Rough Shop Floors and Uneven Ground. Lifting Capacity up to 275 lbs. This unit is Compact and Lightweight. Assists in Avoiding Back Injuries.