Thunderbike Knuckledust • Harley-Davidson Low Rider ST Umbau

Knuckledust – Built to Perform

The Knuckledust is a Low Rider ST that visibly showcases performance. Despite all the modifications, the Low Rider ST’s clean lines remain unmistakable—yet we consistently push them to the limit with our parts. The focus is on the intricately designed paint job: a striking green with plenty of sporty accents. Club style meets a clean, technical design language, making the bike an eye-catcher with a sporty character even when stationary.

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Performance Bike. Performance Parts.

A vibrant paint finish with a retro touch.

Brands immortalized in the paint. “117” as a bold statement!

Wheels & Brakes

The proportions have been deliberately sharpened. The front wheel is now 21 inches, the rear 18 inches—fitted with our in-house-produced three-piece New Digger wheels.

The spoke design underscores the sporty character, while the glossy black wheel, with its deliberately raw-looking bolt connections, creates a technical aesthetic and is a real highlight in its own right. At the same time, the larger front wheel now fills the original front fender perfectly, ensuring a harmonious overall look.

Up front, 340 mm floating Spoke brake rotors are paired with radially mounted monoblock calipers from Brembo. At the rear, a matching Spoke rotor completes the system. The specially developed adapters and the Pro Performance brake anchor allow for precise integration of the calipers while ensuring a clean, technical look. On the drive side, a matching pulley in the Spoke design has also been installed, consistently continuing the design theme. The Wilbers Nivomat suspension kit takes stability and comfort to a new level. Combined with the massive braking system, the result is a setup that remains composed even under heavy loads.

Thunderbike Knuckledust - Harley-Davidson Low Rider ST Umbau Low Rider ST FXLRST Milwaukee-Eight

Sporty & comfortable

The seating position is designed with control in mind. The club-style handlebar, with a diameter of 1.25“, tapers to 1”-diameter ends, measures 830 mm in width, and is mounted on a 9-inch riser kit with 1″ pullback and an integrated round speedometer mount at the bottom—creating a direct connection between rider and machine.

The satin-finished aluminum-machined grips, combined with drilled toppers, ensure a comfortable feel and a premium look. Frameless mirrors from Motogadget do away with glass—instead, the aluminum itself serves as the mirror surface.

In the lower section, a forward-mounted footrest setup is used. The combination of satin footrests, matching pegs, and passenger footrests blends a sophisticated look with sporty performance. The Pro SDC Performance Gripper seat from Saddlemen provides optimal grip—even during hard acceleration.

Club-style pullback riser kit with integrated round speedometer, mounted below the riser.

Machined base-satin grips with drilled toppers, paired with frameless mirrors from Motogadget.

The mid controls have been replaced with a forward-mounted footrest assembly featuring satin-finish footrests.

MEHR LADEN

Harley-Davidson Knuckledust

Model: Low Rider ST | FXLRST | Softail ● Engine: Milwaukee-Eight 117ci/1917ccm

Thunderbike Spoke Wheel
Motogadget mo.view Sport 150 Mirror black
Thunderbike Riser Kit Clubstyle 9′′ Pullback black
Thunderbike Handlebars Club black
Thunderbike Grips Base Satin black cut
Klock Werks Flare Windshield 6′′ dark smoke
Thunderbike Front Axle Cover-Set black matte
Kellermann Bullet 1000 Turn Signal (1)
Thunderbike Tank Mount black
Thunderbike Forward Control Kit black
Thunderbike Passenger Footpegs Satin Design
Thunderbike Footpeg Set Base Satin Design
Thunderbike Toppers Base
Harley-Davidson Adjustable Hand Control Lever Kit black
Thunderbike Brake Disc Spoke Floated 340mm
Thunderbike Brake Disc Spoke Floated 292mm
Thunderbike Pulley Spoke polished
Thunderbike Brake caliper adapter Pro Performance Radial black
Thunderbike Brake Caliper Adapter Set Radial 300->340mm black
Brembo Radial Brake Caliper rear 100mm black
Brembo Radial Monoblock M4 Caliper Set black
Thunderbike Lower Brake Lines with Distributor 47cm
Thunderbike License Plate Frame Inside Plate
Thunderbike Down & Inside Bracket
Thunderbike Turn Signals Stripe LED 3in1
Thunderbike Eliminator-Kit Rücklicht
Thunderbike Axle Cover Swingarm right
Thunderbike Axle Cover Swingarm left

Functional details – Contrasts with character

The turn signals are seamlessly integrated—compact at the front with cartridge-shaped turn signals from Kellermann mounted on the fairing, and at the rear via our 3-in-1 turn signals on the license plate. The Inside Plate with Down & Inside Mount discreetly relocates the license plate to the rear. Details such as axle covers, tank mounts, and neatly routed brake lines underscore the high-quality, precise execution. The windshield from Klock Werks fits perfectly into the front and reinforces the aggressive club-style look with its pronounced outer edge.

Engine & Finish

The Milwaukee-Eight 117 forms the powerful heart of the Knuckledust. It is complemented by a 2-1 slip-on exhaust system from Jekill & Hyde, which delivers a powerful, commanding sound.

Engine components such as the rocker boxes and tappet covers have been powder-coated red. Red ignition cables from Screamin’ Eagle underscore the Softail’s performance character and break up the dark base look.

A central highlight is the elaborately designed paint scheme by Ingo Kruse. The combination of rich green, deep black, and warm beige tones gives the Knuckledust a distinctive, powerful identity. Clean lines, racing-inspired surfaces, and partner logos are deliberately integrated into the design, evoking classic motorsports. On the saddlebags, the striking “117” makes a clear statement: it stands for the high-output Milwaukee-Eight and confidently showcases the bike’s power.