Super Shims

Eliminate the wiggle from your derailleur mounting bolt to improve your shifting and reduce drivetrain noise! This is a great bang for your buck!

How? The Super Shims fit in the SRAM mounting bolt assembly. They remove they wiggle and add compression force, while still allowing the derailleur to pivot about the bolt.

Review: Check out the awesome ThunderStruckMTB review here!

Tip: You can also source these parts yourself from a hardware supplier of your choice. We provided some example links in case that is helpful. Regardless of where you source the parts, just make sure to stick to the specs listed.

Includes:

• Small O-Ring
  • 1mm thickness, 8.5mm ID, 10.5mm OD., 90 Shore A durometer
  • Used only on configuration A
• Large O-Ring
  • 1.5mm thickness, 13mm ID, 16mm OD, 90 Shore A durometer
    
  • Used on configuration A and B
• Wave Spring
  • 0.3mm thickness, ~10.3mm ID, ~15mm OD
    
  • Used only on configuration A
• Star Washer
  • 9mm tooth ID, 14mm OD, black phosphate coated spring steel. 
    
  • Used only on configuration B

Compatibility:

SRAM has 2 mounting bolt configurations for these derailleurs. The Super Shims kit contains all the parts for either type, but you will not need each part. Watch the installation video to show how to install them on each type. 

Configuration A:

• SRAM 12 speed Eagle AXS: GX, X01, XX1
• SRAM 12 speed Eagle mechanical: X01, XX1

Configuration B:

• SRAM 12 speed Eagle mechanical: GX
• SRAM 11 speed MTB: GX, X01, XX1
• SRAM 11 speed road: Force