Tripeak Oversize Pulley Kit 12/18T, Ceramic Bearing Shimano Ultegra/105, 12-Speed - Gold Bliz It’s engineered and tested to

It’s engineered and tested to securely hold bicycle water bottles while still offering left and right side-loading action

you will need the extra spacer

To turn on the PRO

Steel cage with serviceable precision pulleys

For mounting just lay it on the carrier and fix it with the spring clamp

Tripeak Oversize Pulley Kit 12/18T, Ceramic Bearing Shimano Ultegra/105, 12-Speed - Gold Bliz It’s engineered and tested toProduct Description Tripeak Oversize Pulley Wheel Kit 12 18T, Ceramic Bearing (Shimano Ultegra 105, 12 Speed) Gold Specifications: Replacement Oversize Pulley Wheel Set 12 18T (Vs 11 11T in existing cage) Oversize ceramic bearings for 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 Available