Iconic Performance: Performance Machine Classic 1-Piece Steel Rotor

When it comes to custom Harley-Davidson braking, Performance Machine (PM) has set the standard for over 40 years. The Classic 1-Piece Steel 11.8″ (300mm) Front Rotor combines the timeless PM design language with modern metallurgy. Unlike multi-piece rotors that can be cost-prohibitive, this 1-piece steel unit offers the same aggressive “Classic” hole pattern and high-friction surface in a rugged, dependable format that is built to handle the torque and weight of modern Big Twins.

Proprietary 420 High-Carbon Steel

The secret to Performance Machine’s longevity is their material choice. Each rotor is laser-cut from a proprietary 420 High-Carbon Stainless Steel. This alloy is specifically engineered to provide an immediate “initial bite” and a progressive feel at the lever. The steel is induction-hardened to resist scarring and grooving, then diamond-ground to a perfectly parallel finish. This meticulous manufacturing process ensures a smooth, quiet braking experience and eliminates the lever pulsing often found in lower-quality aftermarket discs.

The “Classic” PM Design

The “Classic” drilled pattern is one of the most recognized designs in the V-Twin world. These precision-drilled holes are more than just a style statement; they are engineered for maximum thermal efficiency. As the rotor spins through the caliper, the holes sweep away heat, moisture, and brake dust, ensuring a clean contact patch. This design significantly reduces the risk of brake fade during aggressive mountain riding or heavy-loaded touring, keeping your braking performance consistent from the start of the ride to the end.

Modern 11.8″ (300mm) Fitment

This 11.8″ rotor is a direct bolt-on for the “Brembo era” of Harley-Davidson motorcycles. It is designed to work seamlessly with factory calipers as well as PM’s own line of high-performance 4-piston and 6-piston calipers:

• Touring Models (2008–2026): Road King, Street Glide, Road Glide, and Ultra Limited (Front).
• Softail Models (2015–2026): Fat Boy, Heritage, Slim, and Low Rider S (Front).
• Dyna Models (2006–2017): Street Bob, Low Rider, and Fat Bob (Front).
• V-Rod Models (2006–2017): All VRSCA/DX/F models (Front).

Installation and Finish Maintenance

Performance Machine rotors feature a high-luster finish that complements chrome or polished wheels perfectly. To maintain this “Show Quality” look, it is recommended to use PM-specific or high-quality Organic/Carbon-Aramid brake pads. These compounds are less abrasive than full-sintered pads, helping to keep the rotor surface smooth and bright. Always use new rotor bolts and follow factory torque specifications with blue thread-locker for a safe and secure installation.

Fitment Notes & Exceptions

Will only work with 11.8″ calipers

This Product Fits

Harley Davidson
Dyna Fat Bob FXDF 2008-2017
Dyna Street Bob FXDB/I 2006-2017
Dyna Super Glide Custom FXDC/I 2006-2014
Dyna Super Glide FXD/I 2006
Dyna Wide Glide FXDWG/I 2006-2017
Electra Glide Classic FLHTC/I 2008-2013
Electra Glide Standard FLHT 2019, 2020, 2021, 2022
Electra Glide Standard FLHT/I 2008, 2009
Electra Glide Ultra Classic FLHTCU/I 2008-2019
Electra Glide Ultra Classic Low FLHTCUL 2015, 2016
Electra Glide Ultra Limited FLHTK 2010-2019
Electra Glide Ultra Limited Low FLHTKL 2015, 2016, 2017, 2018, 2019
Freewheeler FLRT 2015-2025
Road Glide Custom FLTRX 2010, 2011, 2012, 2013
Road Glide CVO/SE FLTRSE3 2009
Road Glide CVO/SE FLTRXSE 2012, 2013, 2018, 2019
Road Glide FLTR/I 2008, 2009
Road Glide FLTRX 2015, 2016, 2017, 2018, 2019
Road Glide Special FLTRXS 2015-2023
Road Glide Ultra CVO/SE FLTRUSE 2011
Road Glide Ultra FLTRU 2011-2019
Road King Classic FLHRC/I 2008-2013
Road King FLHR/I 2008-2019
Road King Special FLHRXS 2017, 2018, 2019
Softail Breakout 114 FXBRS 2018, 2019, 2020
Softail Breakout 117 FXBR 2023, 2024, 2025, 2026
Softail Breakout FXBR 2018, 2019
Softail Breakout FXSB 2015, 2016, 2017
Softail Deluxe FLDE 2018, 2019, 2020
Softail Deluxe FLSTN/I 2015, 2016, 2017
Softail Fat Bob 114 FXFBS 2018-2023
Softail Fat Bob FXFB 2018, 2019
Softail Fat Boy 114 FLFBS 2018-2024
Softail Fat Boy FLFB 2018, 2019, 2025, 2026
Softail Fat Boy FLSTF/I 2015, 2016, 2017
Softail Fat Boy Lo FLSTFB 2015, 2016
Softail Fat Boy S FLSTFBS 2016, 2017
Softail FXDR 114 FXDRS 2019, 2020
Softail Heritage Classic 114 FLHCS 2018-2024
Softail Heritage Classic FLHC 2018-2026
Softail Heritage Classic FLSTC/I 2015, 2016, 2017
Softail Low Rider FXLR 2018, 2019, 2020
Softail Slim FLS 2015, 2016, 2017
Softail Slim FLSL 2018, 2019, 2020, 2021
Softail Slim S FLSS 2016, 2017
Softail Sport Glide FLSB 2018, 2019, 2020, 2021
Softail Standard FXST 2020, 2021, 2022, 2023, 2024
Softail Street Bob 114 FXBBS 2021, 2022, 2023, 2024
Softail Street Bob FXBB 2018, 2019, 2020, 2025, 2026
Sportster Custom XL1200C 2014-2019
Sportster Forty-Eight Special XL1200XS 2018, 2019
Sportster Forty-Eight XL1200X 2014-2022
Sportster Iron XL1200NS 2018, 2019, 2020, 2021
Sportster Iron XL883N 2014-2022
Sportster Low/SuperLow XL883L 2014-2019
Sportster Seventy-Two XL1200V 2014, 2015, 2016
Sportster SuperLow XL1200T 2014, 2015, 2016, 2017
Street Glide FLHX/I 2008-2023
Street Glide Special FLHXS 2014-2023
Street Glide ST FLHXST 2022, 2023
Street Glide Trike FLHXXX 2010, 2011
Tri Glide CVO/SE FLHTCUTGSE 2020, 2021, 2022
Tri Glide Ultra Classic FLHTCUTG 2009-2025