Sram Etap AXS users can go big now. Like Kolossal big! Kolossos is the Greek word for a statue, much larger than the original subject. Sounds appropriate for replacing your 12 tooth pulleys with a 19 tooth bottom and a 14 tooth top pulley, built on the stiffest cage on the market.
Besides reduced friction, this cage is built with shifting accuracy, gravel worthiness and chain retention in mind.
This model will fit on 12 speed Sram Red and Force Etap AXS derailleurs.
It also fits on the A2 version of the Red Etap 11 speed derailleur, released in September 2020. If your derailleur is older, this Kolossos does not fit, but the A2 derailleur is compatible with your system. You need a new derailleur in order to fit Kolossos.
**Kolossos is a component upgrade for Sram Etap AXS derailleurs. Derailleur not included**