Duration: approx. 45mins
How do you upgrade to 12 speeds and set up a wide-range 1x drivetrain? What tools will you need? Is it difficult?
With Ratio Upgrade Kits, you can run a SRAM Eagle™ drivetrain with drop-bar shifters on your road, gravel or ‘cross bike. The kit’s compatible with a large range of SRAM components and the only parts you’ll need to modify are a set of 11 speed mechanical shifters and an Eagle™ derailleur. All the modifications are completely reversible. It will take about 45 minutes.
All SRAM 11 speed shifters road shifters are compatible, but Eagle™ derailleurs from the SX™ and NX™ groups are not as it is not possible to replace the cable fins on these derailleurs. We would choose the GX™ derailleur regardless as the cost increase is small and it’s fitted with much more reliable hardware, including sealed bearing jockey wheels. For more information on compatibility, see our compatibility guide.
There are cassette options for most free hub standards (except Campagnolo, sorry). Eagle™ cassettes are available for XD™/XDR™ (with 1.85 mm spacer) or Shimano HG freehubs. Eagle™ cassettes for HG freehubs have an 11 tooth smallest sprocket instead of a 10 tooth, reducing the total range from 500% to 455%.
The upgrade requires some experience to perform, but if you’re someone who already works on your own bicycle then you won’t have any trouble. If you’re not confident, contact your local bike shop and direct them to this guide.
The upgrade involves two steps: fitting the 12 speed ratchet to the shifter, and fitting the Ratio cable fin to the derailleur. The process is slightly different depending on whether your 11 speed shifters are designed to be used with hydraulic brakes or cable brakes. The upgrade can be completed using the following list of tools:
Upgrading the shifters
Follow our video guides to fit the 12 speed ratchet to your shifters. Take care to follow the appropriate video for your shifter type:
Upgrading the derailleur
In order to run your Eagle™ derailleur with road shifters, you need to fit the Ratio cable fin. Please follow our video guide:
There’s a small circlip that holds the cable fin onto the derailleur. Don’t panic – if you lose it, you’ll find a spare in your kit.
Finally, your frame designer probably expected you to be able to change your derailleur cable tension with an adjuster on the derailleur. Mountain bike derailleurs like Eagle™ don’t have these as standard, but we’ve included one in the kit. Simply slot it into the cable stop in the derailleur and you can fine-tune your gear indexing.
That’s it! You’re now ready to fit the shifters and derailleur to your bike as you would any other groupset. If you have any trouble setting up your drivetrain, please refer to the instruction booklet included in your kit or on our support page. If you have any further questions please contact us.
Finally, please note that modifying your SRAM components may void their original SRAM warranty. Ratio Technology Limited is in no way linked to SRAM LLC.