ZERO Derailleur Pulleys for Shimano 11-speed

Enduro Zero Pulley Assemblies use grade 5 ceramic bearings. Races are won and lost by derailleur pulley drag.

• Sold in Pairs
• 9 Grams
• ABEC 5 precision cartridge bearing
• CERBEC USA Grade 3 Si3n4 Silicon Nitride balls
• 52100 high carbon Chromium alloy races
• Races receive 3 cryogenic treatments and a rust proof Magnetite finish
• "VV" type 2-lip non-contact Silicone labyrinth seals
• Nylon/graphite retainer