Razor 4.0


Heaven sent – Hell bent


With this conversion, we take you back to the events of World War II, when the P51D Mustang rocketed across the skies as an escort fighter for the US Forces. The engine of the fast and agile fighter could be recognized from a distance by its characteristic sound: The 12-cylinder V-engine from Rolls-Royce with 1700 hp flew around 700 km/h. Its sound can be imagined as iconic as that of our Harley-Davidson engines. The owner of this Street Bob has a special relationship with this aircraft and wanted his custom bike to be reminiscent of it in paint and design.

The owner is Nils Buntrock, who has been responsible for marketing at Harley-Davidson Germany since January 2021.  He explains what the saying about heaven and hell on the fender is all about as follows: “It means that you go through with something firmly resolved.” That also fits his approach to his first custom bike: “I got ideas here and there from various custom bikes on your website. The rear fender here, the handlebars there, and so on.”

Not only is the paint job with the original registration number reminiscent of the famous airplane, but the lamp was also meant to mimic an aerodynamic airplane nose. “I got the lamp mask from the LiveWire,” Nils explains. Which meant for us to find a suitable headlight (which succeeded with the Breakout) and to fumble it into this mask with a lot of patience. What succeeded faster with the wheels: The beefy-looking tires we could take easily from a Fat Bob.

The other parts correspond to our proven and popular concept for oldschool bobbers: a swinging rear fender with leather saddle and side license plate holder are among the style-giving modifications at the rear, while the wide handlebars and the forward-mounted footrest system also increase riding comfort.

Andreas Bergerforth talking with Nils Buntrock about his first custom bike and Kim Bergerforth in the shoot with riding shots


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In the paint job, Ingo Kruse has managed to create the desired 3-D effect. The rivets, to which the metal sheets appear to be stapled together, are easy to feel and various surfaces emphasize the rough shell and thus the relationship to the aircraft. Small turn signals, various covers and toppers round out the custom bike visually, and Dr. Jekill & Mr. Hyde provide the appropriate sound.

Satisfied Faces from Nils, Kim and Andreas

Airplane in Thunderbike-Style

Some nice changes with the Street Bob

Once again, we have developed a custombike together with the customer that clearly stands out from other conversions. Take a look at our custom bike gallery to see what we have built so far from the Street Bob. Rightly so, it has become one of the most popular base bikes for conversions. If you – like Nils – like something, then come by our team or call us and we discuss your ideas.

Parts & Details

  • Thunderbike Front Fender Recall
  • Thunderbike Tele Fork Lowering Kit
  • Thunderbike Shock Lowering Kit Stage 1 (20mm)
  • Thunderbike Upper Fork Cover black
  • Harley-Davidson Hollywood Handlebar gloss black
  • Thunderbike Grips Base Satin black cut
  • Thunderbike Toppers Base
  • Thunderbike Turn Signals Stripe LED with Housing
  • Kellermann Bullet Atto DF Turn Signal Set 3in1 black/clear
  • Thunderbike Solo Saddle Titanium II black
  • Thunderbike Seat Mounting Kit Titanium/Titanium II
  • Thunderbike Powerfilter-Kit Grand Classic
  • Thunderbike Ignition Coil Relocation Kit black
  • Thunderbike Forward Control Kit black
  • Thunderbike Footpeg Set Base Satin Design
  • Thunderbike Side Mount Licence Plate Bracket medium
  • Thunderbike License Plate Frame Inside Plate
  • Thunderbike License Plate Lighting
  • Thunderbike Derby Cover Drilled contrast cut
  • Thunderbike Timer Cover Drilled
  • Custom Chrome Pop-Up Gas Cap vented black
  • Thunderbike Frame Cover-Set black
  • Thunderbike Axle Cover Swingarm left
  • Thunderbike Axle Cover Swingarm right
  • Thunderbike Front Axle Cover-Set
  • Thunderbike Rear Axle Cover Set
  • Kruse Design Special Custom Painting

Riding Experience

Riding Gear


Rokkertech High Waist women´s Jeans black

Price: 369.00€*

Jett Helmet ECE matte black

Price: 177.00€*
Thunderbike Clothing

Thunderbike Gloves Retro, black

Price: 39.00€*
* incl. tax, plus shipping


Nico Schnepel

Customparts, Dealer Support

0049 2852 - 6777-30
Send an email


Roman Reiners

Customparts, Dealer Support

0049 2852 - 6777-30
Send an email


Julian Segler

Sales, Financing, Rental, Custombikes

0049 2852 - 6777-41
Send an email


Thomas Emky

Custombikes Service Workshop

0049 2852 - 6777-56
Send an email

More Street Bob Customs

You can find Thunderbike Parts and original Harley-Davidson Parts  in our online shop.


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