Sigma Elastic rubber tread; hardness 70+/-3 Shore A. Polyamide 6 centre.
Plain bearing, roller bearing or ball bearing bore
The plain bearing bore results from a hole in the material forming the centre of the wheel and contains the axle.
In the roller bearing bore, the housing is obtained by moulding and contains cylindrical roller bearings with polyamide 6 cage.
In the ball
Axle composed of ground steel bush with bolt according to UNI EN 24017 and nut according to UNI EN 24032.
Fixed bracket type P
Fixed bracket type P. The fork is made of pressed steel zinc plated.