The Ratio 212 Road Upgrade Kit allows you to operate a SRAM eTap AXS12 speed road cassette and 12 speed Flattop chain with your existing SRAM 11 speed mechanical road shifters and 11 speed 2x-specific Exact Actuation rear derailleur.

Using a 212 Road Upgrade Kit gives you the following advantages:

• Greater gear range and/or closer gear ratios than 11 speed
• Lower cost than wireless electronic. Save $1786 on a Force disc build; $1170 saving on a Force rim brake build*
• Lower weight. Save 382g on a Force disc build & 222g on a Force rim brake build**
• No batteries to keep charged
• The reliability and serviceability of mechanical shifting
• #humanpowered

In your kit you will find:

1. Ratio12 speed Road ratchet, with shift spacing specially designed for AXS 12 speed road cassettes
2. Ratio 11 tooth jockey wheels with stainless Enduro bearings and labyrinth seals, specifically designed for Flattop 12 speed chains & 2x-specific SRAM road rear derailleurs
3. M2.5 screw for shifter ratchet replacement

To use this kit you will need:

1. SRAM 11 speed road shifters from the Red, Force, Rival or Apex groups (22 series 211)
2. SRAM 2x-specific 11 speed rear derailleur from the Red, Force, Rival or Apex groups (22 series 211)
3. SRAM 2x front derailleur from the Red, Force or Rival or Apex groups (22 series 211)
4. A SRAM 12 speed eTap AXS cassette from the Red, Force or Rival groups
5. A SRAM 12 speed Flattop chain from the Red, Force or Rival groups
6. Chainrings compatible with the SRAM 12 speed Flattop chain
7. An XDR freehub

How is this kit different to the 112 Road Upgrade kit:

The 112 & 212 Road Upgrade kits are very similar, they both use a 12 speed Road ratchet. However, the 212 kit uses 11T jockey wheels, specifically designed for SRAM 2x-compatible rear-derailleurs whereas the 112 kit has 12T Jockey wheels.