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Wheel description Injection polyurethane tread; hardness 85 Shore A. Thermoplastic centre. Hub with ball bearing Hub with double shielding ball bearing, co-printed in centre (diam. 80-125 mm). Hub with double shielding ball bearings (diam. 150-200 mm).The bearings are protected from dirt, machining residue and corrosive substances by a glass-fibre reinforced polyamide installation bushing with internal labyrinth seal. Diam. 250 mm: hub with shielded ball bearings with interference assembly in the seats obtained by centre moulding. Stainless steel axle Axle composed of stainless steel bolt according to UNI EN 24017 and stainless steel nut according to UNI EN 24032. Swivel top plate bracket NLX with front lock Swivel top plate bracket type NLX. The plate, the ball rice ring and the fork are made of AISI 304 stainless steel; swivel actions: double ball greased race of AISI 304 stainless steel with dust protection seal made of polyethilene. The king pin is integral with top plate and duly rivetted. The front brake is necessary to lock wheel and top plate rotation. |