Features: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.Technical specifications:Axle: 19 mm,Standard: 12mm,Width: 110mm,Brake system: DISC - IS (6-Lock),Holes: 32,Weight: 145g.