Axle size is 15.75-inch x 0.5-inch.
| Justrite Replacement 8" Semi-Pneumatic Wheels and Axle Set for Gas Cylinder Hand Trucks, Steel, 35372 Justrite Replacement 8" Semi-Pneumatic Wheels and Axle Set for Gas Cylinder Hand Trucks, Steel, 35372 Wheels are 8-inch x 1. For gas cylinder hand truck model 35000.