enduro-zero-derailleur-pulleys-ceramic-bearings-shimano-10-speed-road
enduro-zero-derailleur-pulleys-ceramic-bearings-shimano-10-speed-road, Enduro Zero Pulley Assemblies use grade 5 ceramic bearings. Races are won and lost by derailleur pulley drag.VV" type 2-lip non-contact Silicone labyrinth sealsNylon/graphite retainer