CNC - made in Germany, high-strength 7075 aluminium
Stainless steel Edelstahl angular contact ball bearings, double sealed
R2 seal (rubber lip seal), R3 seal (metal sheet supported rubber seal)
19mm aluminium Axle - even lighter and more rigid
Ratchet-System - extended service life and better transmission  
Straightpull Flansch - max. wheel stiffness
The Clamp System - Axial play of the axle can be adjusted