Designed for the Sram Eagle 12 speed mountain bike derailleurs, these pulleys maximize the tooth count to reduce friction The specific 14 tooth upper and lower pulley wheels are built to last: aluminum cogs, serviceable bearings to resist the most challenging mountain bike conditions Compatible with Sram Eagle 12 Speed X-Horizon derailleurs Cross seals only Sram Eagle 12sp RedUPC/EAN/GTIN: 735201956954