15T Bike Aluminium Alloy Roller Ceramic Bea Mountain Rear Derailleur Pulley

Supporting for various speed shifting. Offers you a better cycling experience. Can be applied for most mountain bike, s, road bikes, folding bikes, etc. Adopting aluminum alloy and ceramic material, this product is very to use. Item Type: Rear Roller Material: Aluminum Alloy + Ceramic Color: As shown in the picture Specification: 15T Length Size: Approx.55mm Celsius 2.17in Installation Size: Approx.6mm Celsius 0.24in axes Small Size: Approx.4mm Celsius 0.16in Large Size: Approx.5mm Celsius 0.20in