CUSTOM BMW BIKE THAT RIDES ON THREE WHEELS
This BMW three wheeler bike is a one-off custom built by Tim Cumpert of Cumpert Contraptions, starting from a 1992 BMW R100R Mystic and mating its boxer-engined frame to an ATV front end. The result is a retro punk trike inspired by pre-war racing cars, riding on three wheels instead of two, with hand-formed sheet aluminium bodywork that took years of patient fabrication to complete.
What is the BMW three wheeler bike by Cumpert Contraptions?
Designed by Cumpert Contraptions, this custom BMW build is a unique and captivating creation that stands out with its retro punk aesthetic. Instead of the traditional two wheels, this one-of-a-kind machine sits on three wheels, which adds to its quirky charm. It is exactly the kind of modified BMW bike that turns heads, blending classic boxer mechanicals with a silhouette borrowed from early motorsport.
What donor bike was used for this 3 wheel BMW?
The base for this project was a 1992 BMW R100R Mystic, which Tim Cumpert acquired for his experimental build. He cut off the front and replaced it with a chassis from an ATV, then used that as the foundation to bring his vision to life. The two frames were similar in width, so the main challenge was lining them up before the hand-built bodywork could begin. The full build story, including the seven-year timeline, is documented by specialist outlet autoevolution.
What inspired the three-wheeled design?
According to Tim, the three-wheeled design was inspired by pre-war racing cars, and he wanted to try his hand at sheet aluminum fabrication.
In an interview with Bike EXIF, he said: "When I started this project back in 2012, Morgan had just released their new 3 Wheeler. But the main drive for this project was that I wanted to try my hand at sheet aluminum fabrication." You can read the full interview at Bike EXIF.
Discover custom BMW motorcycles at TheArsenale
If this BMW 3 wheel bike fires your imagination, TheArsenale curates a rotating collection of bespoke builds. Browse the full TheArsenale motorcycles collection, or discover custom BMW machines like the BMW R100 Scrambler #32, the L'Echappee Belle BMW R-Nine T and the BMW K100 Sir Ulrich, each a one-off interpretation of the classic BMW boxer and K-series platforms.
Photo: Bike EXIF
