Compatibility

The Ratio Mech came about not only as a way to improve shifting performance, but also as a way to mix and match different drivetrain options. The Mech will work with a wide range of different setups simply by using a different cable fin so, to help you get the right Mech, here’s a detailed dive into compatibility.

Please note the Mech is only compatible with 1x setups

Shifter	Cassette	Cage	Fin
SRAM Apex 12 speed	SRAM XPLR/AXS road 12 speed	Short	A
SRAM Eagle 12 speed	SRAM XPLR/AXS road 12 speed	Short	A
SRAM 10/11 speed road (fitted with Ratio 1×13 ratchet*)	SRAM XPLR 13 speed	Short	B
SRAM Apex 12 speed road (fitted with Ratio 1×13 ratchet and Ratio Cable Spool*)	SRAM XPLR 13 speed	Short	B
SRAM 10/11 speed road (fitted with Ratio 1×12 Wide ratchet*)	SRAM Transmission 12 speed	Long	C
SRAM 10/11 speed road (fitted with Ratio 1×12 Road ratchet*)	SRAM XPLR/AXS road 12 speed	Short	D
SRAM 10/11 speed road (fitted with Ratio 1×12 Wide ratchet*)	SRAM Eagle 12 speed	Long	D
SRAM 11 speed road	SRAM 10/11-42T 11 speed	Short	-coming soon-
Shimano GRX 12 speed	Shimano 10-51T 12 speed	Long	E
Shimano GRX 12 speed	Shimano 10-45T 12 speed	Short	E
Shimano GRX 12 speed	Shimano 9-45T 12 speed	Short	E
Shimano GRX 11 speed	Shimano 11-42T 11 speed	Short	-coming soon-
Shimano MTB 12 speed	Shimano 10-51T 12 speed	Long	F
Shimano MTB 12 speed	Shimano 10-45T 12 speed	Short	F
Shimano MTB 12 speed	Shimano 9-45T 12 speed	Short	F
SRAM Apex 12 speed	SRAM Transmission 12 speed	Long	G
SRAM Eagle 12 speed	SRAM Transmission 12 speed	Long	G
SRAM Apex 12 speed	SRAM Eagle 12 speed	Long	H
SRAM Eagle 12 speed	SRAM Eagle 12 speed	Long	H

*If you want to use 10/11 speed shifters with a 12 or 13 speed cassette, you’ll need to upgrade the ratchet in your shifter. Additionally, if you have a SRAM Apex 12 speed shifter you will need to install our Cable Spool too.

For more information on the difference between the direct mount version and the hanger mount version of the Mech, check out this explainer page.