Bbb Rollerboys Ceramic Sram Jockey Wheel Set Black / Red 12-14t unisex

The Roller boys Ceramic 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 super smooth. High quality pulley wheels are a must have for every serious bike rider, with the Roller Boys Ceramic you are good to go.Narrow wide:- The term is used for single speed crankset and indicates the position of the teeth towards the left side and right side of the chainring, thus holding the chain better on the chainring.Features:- 12x14T Ceramic derailleur pulleys- Equipped with low friction ceramic bearings for ultra-smooth glide and exceptional durability- Narrow Wide tooth profiling ensures ultimate chain retention.- Composite material provided by EMS Swiss, with 40% glass-fiber mixture- Lubricated with special ceramic light oil for extra smoothness- Compatible with SRAM 12-speed MTBSpecifications:- Pulley size: 12/14T- Bearings material: Ceramic- Gears: 12-speed- Compatible with brands: SRAM- Part materials: Grivory EMS- Narrow wide: Tension pulley only- Weight (g): 26