Wheel centre made of Polypropylene Impact copolymer.
Precision ball bearing in the wheel centre.
Tread: solid rubber.
Product No 3SPUW / 4SPUW / 5SPUW / 6SPUW Wheel diameter 75mm / 100mm / 125 mm / 150mm Width of Tread 29mm / 31mm / 31 mm / 32mm Axle Hole Ø 8 mm / 8mm / 8mm / 10mm Hub length 37 mm / 40mm / 40mm / 43mm Hardness of tread A 95