BBB RollerBoys SRAM 12T Jockey WheelsThese jockey wheels are a great way to breathe new life into your existing set-up and they’re specifically designed for use with SRAM road, gravel or mountain bike (MTB) rear derailleurs. They feature a reliable Grivory EMS construction, which is a composite material provided by EMS Swiss with a 40% glass-fibre mixture. BBB has also kitted these out with a narrow-wide tooth profile for ultimate chain retention wherever your next adventure leads you. Another highlight is these are equipped with low friction ceramic bearings for ultra-smooth glide and exceptional durability. Coming lubricated with special ceramic light oil, these deliver extra smoothness for a wide range of riding disciplines.The Rollerboys will make your bike ride so smooth that you will never stop anymore! The composite material is strong and durable and the special teeth pattern makes sure you can shift to a higher gear with the speed of light. The ceramic bearings make sure your pulleys will roll so smooth that you never want to stop riding anymore. High-quality pulley wheels are a must-have for every serious bike rider, with the RollerBoys you are good to go.For more than 20 years BBB Cycling is part of your ride. Established in 1998 by two passionate cyclists, Chris Koppert and Frank Moons following their retirement from professional racing in the 90’s. Being former professional cyclists themselves they understood what cyclists needed and started to create quality products.Features: Material: Grivory EMS Use: Road, Gravel or MTB Compatibility: SRAM Rival 1, CX1, Force 1, X1, XX1, X01 and GX1 Tooth Count: 12T Tooth Profile: Narrow-Wide Bearings: Ceramic Lubricated: Yes, with special ceramic light oilTechnologies: Narrow-Wide tooth profiling ensures ultimate chain retention. Composite material provided by EMS Swiss with 40% glass-fibre mixture. RollerBoys equipped with low friction ceramic bearing for ultra-smooth glide and exceptional durability. Lubricated with special ceramic light oil for extra smoothness.Manufacturer’s Part Number: 2913610601 Black One Size 12TBuy BBB Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.