CNC Bike Quick Release Skewer Front & Rear Wheel Axle is a CNC‑machined lever and clamp system designed for both mountain and road bicycles. The skewers use a Cr-Mo steel axle with an aluminum clamp, delivering high strength, precise clamping, and corrosion resistance in typical riding conditions. The set comprises two skewers for front and rear wheels.

• Material: Cr-Mo steel axle; aluminum alloy clamp; anti-corrosion and anti-rust design.
• Axle diameter: 4.5 mm.
• Road bike specifications: front release size 131 mm; rear release size 162 mm.
• Mountain bike specifications: front release size 131 mm; rear release size 168 mm.
• Lock wheel sizes: Front 100 mm; Rear 130 mm (road) or 135 mm (MTB).
• Package: two pieces (front and rear).
• Compatibility: fits most road bikes and most mountain bikes; please confirm hub size or fork opening distances before purchasing.