Bicycle Derailleur 12T Mountain Bike Wheel Pulleys Bearing Jockey Pulley Set Parts Red

Features: Steel bearing is high strength and smooth, which ensures fast and sensitive working. Main body is made of aluminum alloy, wear resistant, anti rust and lightweight. Solid casting and fine machining, durable for long time use. Comes with a 4mm and 5mm adapters, suitable for various bikes. 12T is compatible with the most, support for 9 10 11 speed bikes. Specification: Color: Black, Red (Optional) Material: aluminum alloy Diameter: 50mm 2in Weight: Approx. 20g Package List: 1 x Pulley wheel 2 x Adapters