1. Finish:Bright zinc plating. 2. Rigid: Welded with heavy duty gauge steel for extra stength. 3. Construction: Formed from 1/4" thick steel for extra strength. 4. Axle: 1/2" dia. bolt with zerk and lock nut. 5. Fork Leg Spacing: 2-1/2" 6.Optional heat treated raceways and top plate.