AXIS 320mm / 12.6″ Full-Floaters


Updated 3/23

Our Big-Brake kits for the Harley big twins is all about performance.  Consists of our patented AXIS series 320mm (12.6 inch) full-floaters in the Cobra SS series stainless steel in optimized petal design.  Add into this robust billet machined caliper adapters in the Black Diamond hard anodize finish to fit the Brembo 4 piston twin-pin calipers, arguably the world standard of performance.  The Brembo calipers are not included in any of these kits and must be purchased separately.

This upgrade kit is designed with the very serious, performance oriented enthusiast in mind where aesthetics, though important, take a backseat to those looking for a genuinely big boost in braking!

The advanced design AXIS™ full-floaters offer substantially improved performance in terms of both modulation at the lever and overall braking power.  The patented advanced floating system of the AXIS series full-floaters is many times stronger than conventional semi-floating brake rotors.  The heart of this patented design has the floater buttons controlling radial and axial float only, they are non-load bearing.  All of the considerable braking forces are channeled through the trademarked Direct-Link™ architecture comprising over an 800% increase in surface area load transfer as compared to conventional floating brake rotors…simply a far superior design!

Plus we are the first major brake rotor manufacturer to include hi-tech Cryogenic processing on the entire line of performance rotors as a standard operational component of manufacture.   The inclusion of this advanced technologically employing computer controlled, 40 hour deep freezing treatment provides greater thermal stability along with improved wear resistance.




Late Model Harley Spoke Mount Series

On the new front is the Cobra SS 320mm Performance Upgrade series rotors for the late model Harley’s.  A significant departure from our current offerings as this all new design employs a 5-pt mounting system attaching to the spokes of the cast OE wheel.  The BTHD-33 & 34 series (320mm x 5mm) features some very innovative and exclusive design elements that truly set it apart from anything else on the market.

The BTHD-34 series is a dedicated new design architecture expressly for the spoke mounted Harley’s.  To obtain the strength and stability we require, the design development incorporates what we call an InterPhase Link system to increase thrust-face area for improved assembly strength and thermal transfer.  Effectively then, this novel concept system achieves a 10-pt thrust-face configuration with five bobbins, seamlessly matching the symmetry of the OE wheels.  

The new design provides a significantly higher overall level of braking performance compared to the standard issue OE rotors.  These new BT/Harley over-size rotors are available individually or in Kit form with billet caliper relocation adapters.

•    BTHD-33.SL & SR:  Cobra SS 320mm x 5mm (full circle mounting holes)

•    BTHD-34.SL & SR:  Cobra SS 320mm x 5mm (half-moon mounting holes)



AXIS 330mm (13″) Roadrage Front Floaters

For the drop-dead serious Harley Performance enthusiast;  the all-new 330mm x 6mm semi narrow-band is a direct pick-up of our Supersport race-spec front floaters.  Although designed for top level roadracing, the new 13″ AXIS floaters incorporate all the features designed into our race series rotors but expressly for Harley big motor performance riders.  Available in both our AXIS/Cobra premium spec stainless steel as well as our 100% billet AXIS/Iron.  BTHD-36 series (Hub mount only), use the BTHD-37 series for the spoke mount configuration models.


The following details the range of brake pad compound offerings from Ferodo for the Brembo 4-pot / twin-pin and OE calipers:

Although not an ultra high friction compound, the Platinum™ organic pads have the most feel and modulation at the brake lever and is the Number One performing organic road friction material for a broad cross-section of street bikes. Developed from technology gained from Ferodo’s World Racing program, the Platinum compound offers excellent all-around braking response with a co-efficient of friction level that is both linear and consistent.For real-world street use with stainless steel or iron rotors, we recommend the high performance Platinum pads as they are remarkably user friendly offering great overall power and modulation for those that do not prefer a high level initial bite.  The result is superb feel and feedback at the brake lever with the added benefit of low abrasion which is very kind to brake rotors

The Platinum organic compound is also the dominant material used extensively in both MotoGP and World Superbike as “the” rear brake pad due to its incredible feedback and added control it delivers at the pedal.  AHRMA Vintage class roadracing is yet another venue where the Platinum organic provides an optimal blend of power and control for a large cross-section of these classic series race bikes.

• FDB2042P;   Platinum organic – Brembo twin-pin calipers

• FDB2210P;   Platinum organic – OE Brembo calipers

SinterGrip ST:
Ferodo SinterGrip ST brake pads represent the very latest in leading edge technology of sintered metal friction design.  These new pads provide outstanding performance not only in setting the standard for all-out braking power, but in truly remarkable feel and feedback as well.   Designed to be kind to stainless rotors, this advanced composition friction material allows the wheel to spin much more freely in comparison to other HH brand brake pads that create a power robbing and excessive brake drag situation on the rotor.  The FERODO SinterGrip pads offer incredible stopping power combined with precision control, minimal brake drag, lower operating temperature and quick bed-in for a significant improvement in overall performance.

• FDB2042ST;  SinterGrip HH-rated – Brembo twin-pin calipers

• FDB2210ST;  SinterGrip HH-rated – OE Brembo calipers

SinterGrip XRAC:
The new SinterGrip XRAC series sintered Factory race pads feature the culmination of our ongoing development of sintered metal technology with the Factory Yamaha teams from both sides of the pond.   This formulation offers superb power and control with excellent thermal stability.  In addition, it features the introduction of our new and trademarked Array Cooling technology to reduce friction material smearing under severe thermal load conditions.  Relatively high initial friction with powerful, but user friendly torque characteristics that offer late braking consistency, lap after lap. This compound features special adaptations making it not only compatible on the CMC rotors, but a terrific performer as well.

• FDB2042XRAC; Brembo twin-pin Race

• FDB2042ZRAC; Brembo twin-pin Race

CPro Carbon/ceramic:

Also new is the long awaited and brilliant performing CPro organic series race pads.  This replaces the popular and long standing CP1 carbon/metallic pads with an entirely new friction composition technology incorporating advanced Siloxane polymers into a truly innovative Carbon/ceramic matrix.  This is not a case of simply adding ceramic particulates (friction modifiers) to the mix but rather and a new and different approach how organic composition racing brake pads operate.  Provides tremendous power and control at the brake lever with a predictable and  reassuring rising torque curve for that added power, deep into a corner – whenever you need it, time after time.  Performs brilliantly on stainless and even better on our Ductile Iron brake rotors.  Plus very low abrasion as well.

• FDB2042CPro;  Brembo twin-pin Race
Above fitment is for the Brembo 4-pot, twin-pin and OE Brembo calipers only.

Click here for the Harley Upgrade product application & price guide.


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Reidsville, NC 27320.
(951) 471-3476


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