New Dude

Uncle Slim

Big Mike

customized Harley-Davidson Fat Boy

Call me Boss!

We enhanced the Fat Boy’s dominant appearance with a few targeted measures during this rebuild. The continuous matte black color with only a few glossy accents makes a powerful statement. Even the frame was blacked out, for which we had to disassemble the entire bike into its individual parts. On this occasion, we immediately replaced everything that supports our concept of an impressive Boss Bike.

Somewhat unusual appear the large wheels on the Fat Boy, which with their orig. wheels in 18 inches otherwise looks even more beefy. The 21 and 23 inch CNC machined aluminum wheels in the popular Spoke design are like most of the other replaced parts made in Hamminkeln.

With the lowering at the front and the adjustable suspension at the rear, we still achieve the desired crouched stance. The original handlebars sit on our oldstyle risers and have aluminum grips that, along with the tank emblems, are among the few interruptions in the matte black finish.

The single-sided swingarm, shortened headers with the Jekill & Hyde exhaust system and side license plate reveal this insanely beautiful design and fat rubber in 260 width.


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  • Thunderbike Single-Side Swingarm Kit 21'' Alu
  • Thunderbike Spoke Wheel
  • Thunderbike Brake Disc Spoke Floated 340mm
  • Thunderbike Brake Disc Spoke Floated 292mm
  • Thunderbike Pulley Spoke
  • Thunderbike Tele Fork Lowering Kit
  • Thunderbike Seat Plate
  • Thunderbike Rear Fender Steel 260 mm
  • Thunderbike Chin Fairing GP Style Long
  • Thunderbike Forward Controls Base Alu
  • Thunderbike Passenger Footpegs Alu Design
  • Thunderbike License Plate Lighting
  • Thunderbike Riser Kit Old Style with wireholes
  • Thunderbike Grip-Set Base Alu
  • Thunderbike Turn Signals Stripe LED with Housing
  • Thunderbike Toppers Base
  • Thunderbike Airbox Cover Oval Torque TB-Logo
  • Thunderbike Timer Cover New Custom
  • Thunderbike Fuel Tank Dummy Cap Pop-Up Style
  • Thunderbike Cover Tank to Seat, black
  • Harley-Davidson Cover Battery Right, Gloss Black
  • Harley-Davidson Tank Medallion right
  • Harley-Davidson Flush Mount Fuel Cap gloss black
  • Metzeler ME888F Front Tire 130/60B23 M/C TL 65H
  • Metzeler Cruisetec Rear Tire 260/35VR21 83V
  • Dr. Jekill & Mr. Hyde Exhaust System

Here is the uni twin and the best buddy of Big Mike: Fast Mike! The same concept as for this Fat Boy we have applied to the more modern-looking Breakout. At first glance they are really very similar, but have a completely different line. By design the Breakout is longer and narrower, the Fat Boy lives up to its name and has a much more powerful appearance.

Besides the different softails as a base, the main differences are the tank and emblems, nose spoiler, lid and grips. Fast Mike is completely blacked out, Big Mike has a few shiny accents.


Contact our team!


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 Fat Boy Customs

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


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