Modern Performance Meets Legendary Style: Arlen Ness 11.8″ Jagged Floating Rotor

For riders of modern Harley-Davidsons, braking is about more than just slowing down—it is about precision, heat management, and style. The Arlen Ness 11.8″ Jagged Front / Rear Rotor is a high-performance floating disc designed specifically for the “300mm era” of Harley-Davidson motorcycles. Moving beyond the limitations of fixed, solid-mount rotors, this Arlen Ness upgrade provides a racing-inspired floating architecture that ensures your brake lever remains firm and your stopping power remains 100% consistent, even under the most demanding riding conditions.

The Floating Advantage for Modern Braking

Modern Harleys, particularly Touring models and V-Rods, are equipped with powerful multi-piston calipers that generate significant heat. Standard solid rotors are prone to “heat-shock,” where the metal expands but has nowhere to go, resulting in warped discs and a pulsing sensation at the lever. The Arlen Ness Jagged Rotor features a Full-Floating design. The 420 stainless steel outer friction ring is joined to a billet aluminum inner carrier via stainless steel float pins. This allows the outer ring to expand and contract independently of the wheel hub, virtually eliminating warping and ensuring the rotor remains perfectly centered between the pads at all times.

Precision Engineered “Jagged” Design

The “Jagged” perimeter is not merely an aesthetic choice—it is functional engineering. The aggressive, CAD-cut angles serve to “wipe” the surface of the brake pads clean with every rotation. This removes the glaze, dust, and gases that can build up during heavy braking, ensuring that you always have a fresh, high-friction surface to grip. This results in a more immediate “initial bite” and significantly better performance in wet weather, as the jagged edges help break the surface tension of water on the disc. The inner carrier is CNC-machined from aircraft-grade billet aluminum, reducing the rotating mass of your wheel for improved suspension response and more nimble handling.

Universal 11.8″ (300mm) Fitment

This rotor is designed as a direct bolt-on replacement for the 11.8-inch (300mm) discs that became the Harley-Davidson standard in the mid-2000s. It features the standard 2.22″ center hole and is compatible with both 5/16″ and 3/8″ mounting hardware (check your specific application for bolt size):

• Touring Models (2008–2026): Fits Front applications for Road King, Street Glide, Road Glide, and Ultra Limited.
• Dyna Models (2006–2017): Fits Front applications on models like the Street Bob, Low Rider, and Fat Bob.
• Softail Models (2015–2017): Fits Front applications for the late-model Twin Cam Softails.
• V-Rod Models (2006–2017): Fits Front and Rear applications for VRSCA, VRSCDX, and VRSCF.
• Fitment Note: This is a 300mm rotor. It will not fit older models originally equipped with 11.5″ rotors unless the caliper is also relocated.

Installation and Pad Compatibility

To ensure the longevity of the polished stainless finish and the floating hardware, Arlen Ness recommends installing new brake pads with every rotor change. These rotors are fully compatible with all modern friction materials, including Sintered, Semi-Sintered, and Organic compounds. For a “show-bike” look that stays clean, we recommend a Carbon-Aramid pad which produces less abrasive dust. Always use new rotor bolts and apply a drop of blue thread-locker, torquing to factory specifications to ensure a safe and secure installation.

Choose the Arlen Ness 11.8″ Jagged Floating Rotor for the ultimate combination of modern stopping power, superior heat dissipation, and the unmistakable Arlen Ness custom look.

Fitment Notes & Exceptions

Fits 2008-2013 Touring (front/rear), 2008-2016 FLHR (front/rear), 2015-2017 Softail (front/rear), 2006-2017 Dyna (front)
Universal fitment, can be installed on the front or rear of HD models equipped w/ 5-bolt hub mounted factory rotors or custom wheels.
Does not fit wheels with 6.7″ bolt circle rotor mount.

This Product Fits

Harley Davidson
Dyna Fat Bob CVO/SE FXDFSE 2009, 2010
Dyna Fat Bob FXDF 2008-2017
Dyna Low Rider FXDL/I 2006-2017
Dyna Low Rider S FXDLS 2016, 2017
Dyna Street Bob FXDB/I 2006-2017
Dyna Super Glide Custom FXDC/I 2006-2014
Dyna Super Glide CVO/SE FXDSE 2007
Dyna Super Glide CVO/SE FXDSE2 2008
Dyna Super Glide FXD/I 2006, 2007, 2008, 2009, 2010
Dyna Switchback FLD 2012, 2013, 2014, 2015, 2016
Dyna Wide Glide FXDWG/I 2006-2017
Electra Glide Classic FLHTC/I 2008-2013
Electra Glide Standard FLHT/I 2008, 2009
Electra Glide Ultra Classic FLHTCU/I 2008-2013
Electra Glide Ultra Limited FLHTK 2010, 2011, 2012, 2013
Road Glide Custom FLTRX 2010, 2011, 2012, 2013
Road Glide CVO/SE FLTRSE3 2009
Road Glide CVO/SE FLTRXSE 2012, 2013
Road Glide FLTR/I 2008, 2009
Road Glide Ultra CVO/SE FLTRUSE 2011
Road Glide Ultra FLTRU 2011, 2012, 2013
Road King Classic FLHRC/I 2008-2013
Road King CVO/SE FLHRSE4 2008
Road King CVO/SE FLHRSE5 2013
Road King CVO/SE FLHRSE6 2014
Road King FLHR/I 2008-2016
Softail Breakout FXSB 2015, 2016, 2017
Softail Deluxe CVO/SE FLSTNSE 2015
Softail Deluxe FLSTN/I 2015, 2016, 2017
Softail Fat Boy FLSTF/I 2015, 2016, 2017
Softail Fat Boy Lo FLSTFB 2015, 2016
Softail Fat Boy S FLSTFBS 2016, 2017
Softail Heritage Classic FLSTC/I 2015, 2016, 2017
Softail Slim FLS 2015, 2016, 2017
Softail Slim S FLSS 2016, 2017
Street Glide CVO/SE FLHXSE 2010
Street Glide CVO/SE FLHXSE2 2011
Street Glide CVO/SE FLHXSE3 2012
Street Glide FLHX/I 2008-2013
Ultra Classic Electra Glide CVO/SE FLHTCUSE3 2008
Ultra Classic Electra Glide CVO/SE FLHTCUSE4 2009
Ultra Classic Electra Glide CVO/SE FLHTCUSE5 2010
Ultra Classic Electra Glide CVO/SE FLHTCUSE6 2011
Ultra Classic Electra Glide CVO/SE FLHTCUSE7 2012
Ultra Classic Electra Glide CVO/SE FLHTCUSE8 2013