BBB Roller Boys 11T-13T Derailleur, Black

BBB Cycling is a Dutch-born, high-quality cycling parts brand for all cyclists, whether they enjoy gravel riding, racing, touring, mountain biking, or just everyday transportation. We've been loved in 40 countries around the world for over 25 years. Made with EMS Swiss composite material with a 40% glass fiber blend Sealed bearings with aluminum caps Compatible with 11-speed SHIMANO GRX (810/815)