42" Between Frame 1.9" OD x 16 Ga. Galvanized Flo-Coat Tube 116028-GP Precision, Metal Housed, Sealed, Greased Bearings • 7/16" Hex Mild Steel Axle, 43-1/4" Long Spring Retained on One End Center Axle Support 90A Green Urethane Sleeve, 1/8" Thick, 2.