Gabbia deragliatore ceramica HY adatta per Shimano 12S R9200 R9250 R8100 R8150 R7100 R7150
Fit with Shimano 12s Derailleur Dura Ace Ultegra 105. Increases the gear-shifting efficiency by reducing the weight pressure applied to the rear derailleur. Ceramic bearing. Top Pulley :12T, Lower Pulley :18T.