wheel center: aluminium
bearing: double ball bearing
galvanized sheet steel housing, pivot bearing with a double ball race, screwing by plate with hole pattern 105 x 84/76 mm, housing with material strength 4.0 mm (fitting) and 3.0 mm (fork), clearance between the fork 60 mm, wheel rim made of aluminium with a tread made of vulcanized elastic tyre (approx. 75° Shore A) grey colored, hub width 50 mm, double ball bearing, screwed wheel axle (incl. all axle material).