La entrada Harley-Davidson Softail Breakout ‘GP-Suzuka’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Inspired by the spirit of the racetrack, this build pushes the limits of custom craftsmanship while maintaining the raw soul of Harley-Davidson.



This machine rolls on Thunderbike Grand Prix wheels — a 9.0×21 rear and 4.0×23 front, wrapped in Metzeler Cruisetec 260/35VR21 and ME888F 130/60B23 tires for an aggressive stance and unmatched grip. The Single-Side Swingarm Kit (21″ Alu) exposes that massive rear wheel, emphasizing the performance-driven design.



Braking is handled by a Thunderbike Streetmaster disc paired with a Brembo Radial Monoblock M4 caliper set for precise stopping power. The Triple Tree Kit Grand Prix 2.0 Performance and Stummellenker Set “GP 2.0” give the front end its race-ready attitude.



A Custom Aluminum Fuel Tank (GP-Style) and Airbox Cover Oval Grand Prix add clean, aerodynamic lines, while details like Phantom E Grips, Forward Controls Phantom Contrast Cut, and Stripe LED Turn Signals bring modern performance to the forefront.



Finishing touches such as Motogadget mo.view Race mirrors, Derby & Timer Covers (Drilled), and Hydraulic Clutch Conversion Kit make this Thunderbike masterpiece not only stunning but perfectly tuned for the road.
La entrada Harley-Davidson Softail Breakout ‘GP-Suzuka’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley GP-Weissach: Born from the Porsche GT3 RS aparece primero en DARK KUSTOM.
]]>Together with our customer Stefan, we created a project that bridges the gap between high-performance automotive engineering and handcrafted custom motorcycle design. This is not our first collaboration with him. Nearly ten years ago, Stefan inspired one of our most iconic builds, the Lamborghini Aventador–themed Thunderbike OUTERLIMIT. Now, the story continues with a new interpretation of power, precision and style.

The inspiration for the GP-Weissach project comes directly from Stefan’s Porsche 911 GT3 RS (992.1), a machine that represents the ultimate track-focused driving experience. Its 4.0-liter naturally aspirated engine delivers 525 hp, accelerating the 1450 kg car from 0 to 100 km/h in just 3.2 seconds. The Weissach Package further enhances performance by reducing weight by around 15 kilograms through targeted lightweight construction.

Visible high-gloss carbon components such as the front hood, roof, exterior mirrors and wing elements emphasize the motorsport character. Inside, the combination of Race-Tex upholstery, red contrast stitching, magnesium shift paddles and carbon fiber surfaces reflects a pure racing atmosphere. Even the magnesium wheels finished in Pyrored inspired the key color accents of our motorcycle.

For the bike, we selected the Harley-Davidson Breakout FXBRS with Milwaukee-Eight engine as the foundation. This model offers the ideal frame geometry to integrate our GP rear conversion and the substantial 9×21-inch rear wheel. The cockpit retains the original digital speedometer but is now seamlessly integrated into a custom-milled triple clamp. The goal was not to copy the Porsche, but to interpret its attitude. Colors, proportions, finishes and materials were chosen to translate the GT3 RS design language into a new aesthetic expression on two wheels.

The GP-Weissach incorporates the latest developments from our high-end GP component line. It features aerodynamically optimized triple clamps, redesigned handlebar mounts with Rebuffini RR90 controls, and a new GP front mask, all contributing to a dynamic and athletic stance. The open primary drive adds mechanical transparency and highlights the powertrain.

The single-sided swingarm, milled from a solid block of aluminum, allows an unobstructed view of the wheel. An air suspension system at the front and a hydraulically adjustable rear setup lower the bike when parked, giving it a dramatic, grounded presence.

A defining aspect of the design is the use of Pyrored accents, directly referencing the Porsche’s wheel color. The wheels of the GP-Weissach are milled from a single piece, then selectively machined after anodizing to create depth, sharp edges and visual motion. Their five-spoke Y-design appears lightweight and technical, perfectly matching the sporty and high-end character of the build. The exposed 21-inch rear wheel, combined with the perimeter brake system, serves as both a functional and visual centerpiece that underscores the precision and craftsmanship of the motorcycle.





At the end of the project, Stefan summed up his feelings in one sentence: “My goal was 100%. You delivered 110%.” For us, that is the greatest recognition. The GP-Weissach is more than a custom motorcycle. It is the translation of supercar performance philosophy into hand-built motorcycle culture. A Porsche created for the racetrack, and a Harley reinvented to share its spirit. Two machines, one shared heartbeat of motorsport passion.
La entrada Harley GP-Weissach: Born from the Porsche GT3 RS aparece primero en DARK KUSTOM.
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La entrada Screamin ‘Eagle engine OuterLimit by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Fat Boy – Royal Purple by Thunderbike aparece primero en DARK KUSTOM.
]]>The customer wanted something truly special, and Thunderbike delivered — dressing this beast in a bold and majestic Royal Purple finish.





Purple, long associated with royalty and nobility, is no coincidence here. This bike made its debut at the Custombike Show in Bad Salzuflen and instantly captivated everyone in the room. Now, it’s forever immortalized under the name Royal Purple.



The true highlight of this build lies in its wheels, crafted using a newly developed manufacturing technique. They resemble Thunderbike’s 25th Anniversary design — monoblock wheels milled from solid aluminum — but with a twist. These aren’t just classic two-tone finishes; their surfaces shimmer in a full spectrum of colors, especially impressive on the 9-inch wide, 21-inch rear wheel.



La entrada Harley-Davidson Softail Fat Boy – Royal Purple by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Fat Boy ‘Dark Inferno’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Style Ape Hanger











La entrada Harley-Davidson Softail Fat Boy ‘Dark Inferno’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Breakout ‘Razor 6.0’ customized by Thunderbike aparece primero en DARK KUSTOM.
]]>Style Dragster














La entrada Harley-Davidson Softail Breakout ‘Razor 6.0’ customized by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Fat Boy 114 ‘Thanos’ by Thunderbike aparece primero en DARK KUSTOM.
]]>The gold and purple color scheme pays direct homage to the iconic Infinity Gauntlet, giving the Fat Boy an enthralling presence. The massive Grand Prix monoblock wheels emphasize strength and precision, while the purple-stitched leather seat perfectly fulfills Jörg’s vision of powerful elegance—a bike that, like the superhero himself, stands above all.
A standout feature is the dual air suspension system, incorporating both the front fork and rear swingarm, allowing the bike to achieve an impressive low stance when parked. This technical refinement evokes the moment when Thanos unleashes his full power. Additionally, the radially mounted dual disc brake system and black engine components create a flawless combination of technical performance and unmistakable style.













La entrada Harley-Davidson Softail Fat Boy 114 ‘Thanos’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Breakout ‘GP-Z’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Contact @thunderbike
Country Germany
Model H-D Breakout
Edititon GP Series
Style Cruiser
Introducing the Harley-Davidson Softail Breakout ‘GP-Z’ by Thunderbike
Hailing from Germany, the Harley-Davidson Softail Breakout ‘GP-Z’ is a stunning addition to Thunderbike’s GP Series. This custom build showcases a jaw-dropping design with striking golden wheels that steal the spotlight. With its sleek lines and attention to detail, the ‘GP-Z’ embodies Thunderbike’s mastery of blending luxury and power in a motorcycle.
Prepare to be amazed by this incredible creation. Stay tuned for all the specs and details at the end of the post!











La entrada Harley-Davidson Softail Breakout ‘GP-Z’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada TB Frames Custombike ‘Dragster RS’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Style Dragster
The renowned German motorcycle manufacturer, Thunderbike, unveiled its latest creation, the TB Series, a stunning addition to their lineup. Designed with precision and innovation, the TB Series exemplifies the brand’s commitment to excellence in custom motorcycle craftsmanship.










La entrada TB Frames Custombike ‘Dragster RS’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Breakout ‘Purple Power’ by Thunderbike aparece primero en DARK KUSTOM.
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La entrada Harley-Davidson Softail Breakout ‘Purple Power’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Sportster S 1250 by Thunderbike aparece primero en DARK KUSTOM.
]]>Contact @thunderbikecustoms
Country Germany
Model H-D Sportster S
Style Cruiser











La entrada Harley-Davidson Sportster S 1250 by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Softail Fat Boy ‘Raptor Force’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Contact @thunderbikecustoms
Country Germany
Model H-D Fat Boy
Style Cruiser











La entrada Harley-Davidson Softail Fat Boy ‘Raptor Force’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Softail Fat Boy 114 performance ‘Undertaker’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Contact @thunderbikecustoms
Country Germany
Model H-D Fat Boy
Style Ape hanger











La entrada Softail Fat Boy 114 performance ‘Undertaker’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley Softail Breakout 114 ‘Burning Skull’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Contact @thunderbike











La entrada Harley Softail Breakout 114 ‘Burning Skull’ by Thunderbike aparece primero en DARK KUSTOM.
]]>La entrada Harley-Davidson Breakout Softail ‘GP-Monza’ by Thunderbike aparece primero en DARK KUSTOM.
]]>Style GP Series
Since 2018, they have been offering the GP models based on the original Milwaukee-Eight chassis. Their latest creation, built on the Breakout platform, was first showcased at the Custombike Show in December. Now, it is presented here in full detail. So, stay seated and hold on tight!
















La entrada Harley-Davidson Breakout Softail ‘GP-Monza’ by Thunderbike aparece primero en DARK KUSTOM.
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