Bike Hub Conversion Spacers Front Rear Hub Conversion Spacers Accessory

Features: Made of premium aluminium alloy material high strength -rust and durable. Easy to change 100 * 15 mm front hub into 110 * 15 mm or change 142 * 12 mm rear hub into 148 * 12 mm. (optional) Easy to install and use. Useful accessory for bike lovers. Specification: Model: 18.9 * 3 mm / 21 * 5 mm (optional) Color: Red / Black (optional) Material: Aluminum Alloy 18.9 * 3 mm: Fit for 142 * 12 mm to 148 * 12 mm(for rear hub) 21 * 5 mm: Fit for 100 * 15 mm to 110 * 15 mm(for front hub) Weight: Approx. 1.2 - 2.2 g Package weight: Approx. 3.2 - 4.2 g Package List: 2* Spacers