Have you wanted to try upgrading your pulley system to the OSPW(Over Sized Pulley Wheel )Alloy pulleys wheels fitted with ceramic low resistance bears over sized wheels to reduce chain twist, improve shifting,
Model Name : SRA1
Cage : Al
Pulley : Al
Bearing : Ceramic
Teeth : 11T + 16T
Compatibility : Type A - SRAM RED(Red, Force, Rival)
Type B - SRAM eTap