Polyurethane tyre, plate dims. 175 x 140 mm, wheel x width 250 x 75 mm, fixed castor. Supplied = assembled. Wheel diameter = 250 mm. Structure = fixed castor. Wheel material = polyurethane (PU) Material of rim = cast iron. Housing material = steel. Max. load at 4 km/h = 1800 kg. Type of mounting = with top plate. Wheel width = 75 mm. Overall height = 314 mm. Wheel bearing = ball bearing. Temperature resistance = -20 C to +85 C. Screw hole diameter = 14.5 mm. Hub length = 82 mm. Hub bore = 30 mm. Fixed castor plate dimensions = 175x140 mm. Swivel castor plate dimensions = 175x140 mm. Screw hole spacing = 140x105 mm. Housing surface = zinc plated. Shore hardness = 92 A. Hardness 92 Shore A. Permanently fixed on precision, machine turned cast rims. Ball bearings with lubrication nipple. Easy rolling, quiet. Hardwearing and cut resistant. Temperature resistant from -20 C to +85 C. Heavy, welded sheet steel housing, zinc plated. Swivel castors with sealed fork head and combined deep groove