12 x 14T CrMo derailleur pulleys. Narrow Wide tooth profiling ensures ultimate chain retention. Composite material provided by EMS Swiss, with 40% glass-fibre mixture. Sealed bearings. Compatible with SRAM 12 spd MTB. Specifications Compatible with brands SRAM Part Material Grivory EMS Bearing Material CrMo Gears 12 spd Pulley Size 12 14T Narrow Wide Tension Pulley Only Weight 26g Colour Black
