wheel center: aluminium
bearing: double ball bearing
galvanized sheet steel housing, pivot bearing with a double ball race, screwing by plate with hole pattern 80/77 x 60 mm, housing with material strength 4.0 mm (fitting) and 3.0 mm (fork), clearance between the fork 52 mm, wheel rim made of aluminium with a tread made of vulcanized elastic tyre (approx. 65° Shore A) grey colored, hub width 40 mm, double ball bearing, screwed wheel axle (incl. all axle material).