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Wheel description Sigma Elastic rubber tread; hardness 70 +/-3 Shore A. Aluminium centre. Ball bearing bore The housing is obtained by moulding and contains ball bearings series Z. Axle Axle composed of ground steel bush with bolt according to UNI EN 24017 and nut according to UNI EN 24032. Fixed bracket EE HD Fixed bracket type EE MHD, with a plate made of forged steel and a fork with two drawn sides electrowelded to the flange. |