We recently featured Ratio’s 11-speed to 12-speed conversion kit on John’s Crust Dreamer using Apex shifters and an Eagle GX rear derailleur. But what if you have 10-speed shifters and you want to convert them to 12? Well, that’s where the new Ratio Upgrade kit comes into play! This upgrade kit allows you to pair 10 or 11 speed mechanical SRAM shifters and a 1x-specific Exact Actuation™ derailleur with a 12 speed eTap™ AXS™ cassette and chain. This delivers a greater gear range and closer gear ratios without the expense or weight of electronic shifting…

See more at Ratio and YES, these kits really do work great!