Ratio now allows you to turn your 2x11 SRAM mechanical drivetrain into a 12- speed system | road.cc
Ratio 2x12 DIY Kit takes 11sp SRAM mechanical road to 12sp - Bikerumor
Ratio's New 1×12 Road Upgrade Kit Converts 10 or 11 Speed to 12 Speed | The Radavist | A group of individuals who share a love of cycling and the outdoors.
SRAM NX Eagle DUB 12-speed Group 11-50 170mm MTB Group Sets | Bike-Discount
Ratio Technology 1x12 Road Upgrade Kit - Wheat Ridge Cyclery | Colorado's Largest Bike Shop
Upgrading your 9/10/11-speed drivetrain to 1x12. | Bikecomponents.ca