OG 13" Complete Radial Big Brake Kit for 18+ Softail & Dyna - Dual Disc

Original Garage Moto — OG 13" Complete Radial Big Brake Kit for M8 Softail & Dyna (Single or Dual Disc)

The OG 13" Complete Radial Big Brake Kit from Original Garage Moto is a complete high-performance braking upgrade for M8 Softail and Dyna builds. Designed for use with stock lowers on conventional and inverted front ends, this kit is available in single- or dual-disc configurations and includes premium components chosen for precision, consistent performance and fade resistance.

Fits most 2018 to present M8 Softail models with hub-mounted rotors (including 2022 to present FXLRS & FXLRST models). Also fits most 2000–2017 Harley-Davidson Dyna models with hub-mounted front rotor(s).

• Galfer 13" oversize floating wave rotor(s) included
• Brembo M4 Monobloc radial calipers included — precision radial caliper design for optimal force distribution and fade resistance
• CNC-machined 6061-T6 aluminum radial bracket (available in multiple finishes)
• Customizable radial billet spacer colors
• ARP hardware included
• Compatible with ABS

• Brake line replacement is required. Required length depends on routing, front-end setup and ride height — see installation instructions for part number recommendations.
• For optimal performance we recommend using a Brembo Radial RCS master cylinder for 1" handlebars:
  • 19 RCS recommended for dual-disc setups
  • 15 RCS recommended for single-disc setups
• Designed for use with stock lowers on conventional and inverted front ends.

Installation instructions (PDF): Download OG 13" Complete Radial Big Brake Kit installation instructions (PDF)

If you have questions about fitment or installation, contact Original Garage Moto.