Kactus Bamboo Quick Release Skewers CNC Titanium Axle - Titanium Spec: Front: 75/100mm; Rear: 130/135mm Material: Titanium Alloy+7075Aluminum CNC Machined 4.4mm hollow tubules axle; 48g (pairs) High temp. resistant washer Antirust Anode Processed Road Bike & Moutain Bike Skewer