Ford Ka Becomes Diwheel Monster

If you’ve been to the right events, you’ve seen them before – the cars with an external cage that let the car complete a somersault in the forward direction under heavy braking. They’re impressive, but it’s possible to take things even further. Enter [mastermilo82] and the RollKa.

The RollKa follows on from the RollGolf, which was a straightforward roll car build. Built around a Ford Ka, it eschews the external cage for a more radical design. The Ka has been shortened, and designed to fit within two enormous steel rims which wrap around each side of the car. Additional idler wheels have been welded to the Ka’s roof to enable it to effectively roll within the outer steel rims.

It’s a rather eccentric design, known as a diwheel. We’ve seen impressive electric versions before, but at least at this stage, this project appears to lack any advanced control systems and gets by on sheer luck and welding prowess. The build is still at an early stage, with episode three starting some early movement tests under power. It’s a testament to what can be achieved with a spacious garage and some imagination, and we can’t wait to see what happens next! Video after the break.

[Thanks to Baldpower for the tip!]

27 thoughts on “Ford Ka Becomes Diwheel Monster

  1. If they slightly increased the space between axles, they could install the tires while mildly underinflated and then adjust tension by changing the air pressure. Then they wouldn’t need all the extra wheels.

    1. The extra wheels aren’t about the tension. His concern was that the large unsupported arcs between the wheels might buckle if you hit a bump. He wanted to provide more points of support to prevent this possibility.

    1. Cars often have a handbrake cable to each rear wheel, joined just under the centre console with a balance bar. Remove the bar, add a 2nd handbrake lever and away you go – fiddle brakes on the cheap!

    1. There only seem to be two issues: having the gas tank feed still take in gas, and having the oil pump still take in oil. Without switching to a dry-sump, this car can only handle momentary inversion.

Leave a Reply

Please be kind and respectful to help make the comments section excellent. (Comment Policy)

This site uses Akismet to reduce spam. Learn how your comment data is processed.