angled triple tree of 7,21 degrees, a steering head at 43 degrees and a fork ankle of about 50 degrees. But no one made angled triple trees at that time, so Tolle had to manufacture one all by him self. The result? A chopper with superb handling!
In 1982 Tolle and his BSA were invited to a number of driving tests performed by the Swedish National Road and Transport Research Institute (VTI). The purpose was to evaluate custom built choppers and compare their handling performance compared against standard road bikes. The driving test was performed on an obstacle course. The bikes that were used were Swedish police motorcycles (BMW), a number of reference bikes and Tolles BSA chopper. ..
Tolle made his first triple tree back in 1979. It was made out of steel and mounted on his BSA with a 17” fork. Back then, nobody really knew anything about trail. Some bikes were sluggish, other wobbled, and a few behaved good, but nobody knew why. The Swedish authorities had stated an arbitrary maximum fork angle of 35 degrees, which made it impossible for most choppers to get
The bike builder with many ideas!
The enthusiast and inventor that helped preserving the chopper riding in Sweden. Read about the events in chopper-Sweden that made Tolle Dehnisch start his company, and that has made the name Tolle well known among bike builders all over the world.
How it all started...
approved by the authorities.
Tolle analyzed the situation. He started to measure the angle of the steering head, the steering axle, and the front axle. Tolle decided that he wanted a 50 mm trail on his chopper and started to do the maths. In order to get the wanted trail he needed an
