Tripeak Oversize Pulley Kit 12/18T, Ceramic Bearing Shimano Ultegra/105, 11-Speed - Red Compression Shorts So you've got a brand

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Tripeak Oversize Pulley Kit 12/18T, Ceramic Bearing Shimano Ultegra/105, 11-Speed - Red Compression Shorts So you've got a brandProduct Description Tripeak Oversize Pulley Wheel Kit 12 18T, Ceramic Bearing (Shimano Ultegra 105, 11 Speed) Red Specifications: Replacement Oversize Pulley Wheel Set 12 18T (Vs 11 11T in existing cage) Oversize ceramic bearings for a longer lifespan For use in default existing derailleur cage of Shimano no need to change chain length Molded composite material for superior durability than metal ones Patented stopper pin for easy installation