For those who doubt the utility of a 1x drivetrain, the Ratio kit is for you. With it, you can run a 12 speed SRAM mountain rear derailleur and a 12 speed cassette, while hanging onto your existing SRAM Rival or Force 11 speed brifter. In a nut shell, most folks think 1x drivetrains are more limited, gear range wise, than a 2x or 3x drivetrain. This is true, unless you can run a 12 speed cassette. E13 and SRAM, as well as Garbaruk, make ultra wide range 12 speed cassettes. The E13 gives the widest range, with it’s 9-50 gearing. A 36t chainring with a 9-50 cassette gives the same gearing range as a 44/34/24 tooth triple and an 11-34 cassette. With less weight, better shifting, no front derailleur.
The Ratio kit is a bit of a bugger to install. We can do it for you, but with some patience and gentle swearing, you can as well. You replace the indexing gear in the shifter, and a small piece on the rear derailleur to make it work. It’s maybe 30 minutes of work, but a great payoff.
How does it shift? Great. You’ll never know it was a hack.
Made in the UK. Only works with Rival or Force 11 speed brifters, and GX, XO or XX1 12 speed rear mechs.