1High Accuracy: Ultra smooth surface in the contact area can achieve high accuracy, low friction rotating seals, provide excellent performance. 2Stable and Reliable: Regardless of the driving conditions, the bike hub can provide amazing long term reliability and smoothness. 33 Pawls Disc Brake Hub: 3 pawls freehub base drive system, sound is clear and sweet, efficient pedaling and faster riding. 4Simple Operation: Easy to install and disassemble. Without any difficult requirements even though you use it for the first time. 5Durable Material: Aluminum alloy bicycle disc brake hub, lightweight and anodized, response speed is faster, the force is more even. Item Type: Bike Front and Rear Hub Color: As Pictures Shown Material: Aluminum Alloy Weight: Approx.538g/19.0oz Speed: 8-9-10-11 Speed Specifications: Front: 2 Bearing, Rear: 4 Bearing Appearance: CNC Machined, Anodized Bright Black Front Hub : Approx. 100x12mm/3.9x0.5in Rear Hub: Approx. 142x12mm/5.6x0.5in TowerBase: 3 Claw Aluminum Base Number of Holes: Front 24 Holes / Rear 24 Holes Elbow Oblique Pull Brake Disc: Suitable for 6BoltsDiscBrake 1 x Front Hub 1 x Rear Hub 1 x Washer