Vulkollan polyurethane tread; hardness 93 +/-2 Shore A. Cast iron centre.
Ball bearing bore or bore without bearings
The housing is obtained by moulding and turning and contains ball bearings series Z. The hub is available also without bearings.
Axle composed of ground steel bush with bolt according to UNI EN 24017 and nut according to UNI EN 24032.
Swivel top plate bracket type NL
Swivel top plate bracket type NL. The plate, the ball race ring and the fork are made of pressed steel zinc plated finish; swivel actions: double ball greased race with dust protection seal made of polyethilene. The king pin is integral with top plate and duly rivetted.