At DMG Motorsports, we present the Lyndall Brakes ARP 12 Point Rear Rotor Bolts — the race-proven fastener upgrade your hub-mounted brake rotor deserves. Engineered in partnership with ARP (Automotive Racing Products), these 3/8-16x1 bolts are purpose-built for rear rotor applications on Harley-Davidson motorcycles, delivering a measurable strength advantage over standard Grade 8 hardware. Whether you're building out a custom bagger, an M8 Softail, or a Dyna, these bolts are the no-compromise finishing touch that keeps your rotor securely locked down lap after lap and mile after mile. Available in machine finish or black to suit your build's aesthetic, this is hardware that works as hard as it looks.

Features:

• ARP-sourced fasteners: Genuine ARP 12-point bolts, renowned for their use in high-performance and racing applications worldwide.
• 3/8-16x1 rear rotor spec: Correct sizing for hub-mounted rear rotors; Lyndall also offers 5/16" bolts separately for front rotor applications.
• Heat-treated 8740 chrome moly construction: Nominally rated at 180,000 psi tensile strength — a substantial margin of safety over Grade 8 hardware.
• Compact 12-point head design: Allows for easy socket access in tight rotor mounting areas for precise, reliable torquing.
• Hub-mount rotors only: Specifically designed for hub-mounted rotor configurations; not compatible with isolated-hub (non-hub-mounted) setups.
• Fits most Dyna, M8 Softail & Bagger models: Compatible with the majority of Harley-Davidson models equipped with hub-mounted rotors.
• Note – 39mm Narrow Glide incompatibility: The 12-point head profile is too tall for 39mm/Narrow Glide front ends and will contact the fork lowers — confirm fitment before ordering.
• Kit of 5 bolts with washers included: Everything you need in one convenient pack; order two kits if performing a dual front rotor setup.
• Multiple finish options: Available in machined finish or black to complement any custom build style.