Mitch Style



customized Thunderbike Harley-Davidson Breakout

The Grand-Prix concept on Softail basis

Probably the most radical Softail, who saw the light of day, is our GP Style. Its roots are in our Grand Prix concept, which was based on one of our custom frames. Now even more modern technology was forth, so that the choice fell on the new Milwaukee Eight engine with 114 cui from the current Harley-Davidson Breakout 2018. Also, the frame remained absolutely unchanged, so that a road approval as in almost all of our conversions is not a problem. Of course, some parts have been further developed for our small series, but have remained very close to the prototypes shown here (see below for details in the Tech Sheet).

A single swingarm with huge perimeter brake, fork bridges with integrated Breakout speedometer, DLC coated fork with radially bolted Brembo brakes in conjunction with a sporty edged sheet metal dress give the bike the desired racing line. The super light Digger wheels and the raised GP Style exhaust put the racing character to the point. Stylish and in a perfect execution is the sporty paint finish – this comes from Kruse Design and is as always a precision landing.

The custom parts (prototypes of the GP style) are now also available as TÜV approved bolt-on parts for easy mounting.


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Probably the most radical Softail, that saw the light of day!

The Making Of

Except for the last screw, the Breakout was disassembled; frames and attachments scanned and were taken as a base for our new parts.

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

Thunderbike Racing Series



GP S “Le Mans”


Laguna Seca




Grand Prix 2


Grand Prix


Production-R 2

TB-R 3


TB-R 2

TB-R 1

Your Contact


Nico Schnepel

Customparts, Dealer Support

0049 2852 - 6777-30
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Roman Reiners

Customparts, Dealer Support

0049 2852 - 6777-30
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Julian Segler

Sales, Financing, Rental, Custombikes

0049 2852 - 6777-41
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Thomas Emky

Custombikes Service Workshop

0049 2852 - 6777-56
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