The ultimate in performance and durability with low stack height and genuinely low weight. Machined from 7050-T6 aluminium with a split-lip seal to keep contaminants out and grease in with less dragA captured compression ring sets the bearing preload and stays true no matter how you ride (no rocking or creaking)Premium split-lip sealed stainless steel bearings give double the protection while decreasing frictionCompatible with Interlock spacersHand polished and anodised.