The Oversized Pulley Wheel System for SRAM Red and Force AXS features a 15-tooth upper and 19-tooth lower pulley wheel setting, for maximum efficiency. 
The handbuilt OSPW System has two spring tension settings, that allows customised setup based on riding conditions. 
 
This 3D-Printed titanium version comes with CeramicSpeed Coated Bearings mounted in upper and lower pulleys. 
 
This OSPW System is also compatible with the 2020 11 speed SRAM Red eTap derailleur featuring a clutch.
 
Note; this OSPW system is not compatible with the SRAM RED, Force, or Rival XPLR eTap AXS rear derailleurs.
 
In the box:
Complete 3D-Printed titanium OSPW System for SRAM Red/Force AXS
CeramicSpeed Oil for Pulley Wheel Bearings, 15 ml. dropper bottle
Custom tool for removal of stock cage and securing of OSPW System