SRAM XX1 BlackBox Ceramic Bearing Pulley Wheels X-Sync 11 Speed

Sram XX1 BlackBox Ceramic Bearing Pulley Wheels X-Sync 11 Speed

Specifications
High-quality rear derailleur's upper and lower pulleys with sealed ceramic bearings make the leap to reduced friction, increased stiffness, lighter weight, and added durability
12 teeth.
Included in delivery: 1 pair, 10ml grease

Mfr Claimed Weight
TBC