Design space: Maddak reinvents the wheel Product: Maddak Morph Wheel Design: Vitamins Territory: US London design company Vitamins wanted to create a wheel for wheelchairs that was easy to travel with and store. Smaller wheels take less space, but bigger ones are easier to propel manually and place the user at a better height. Vitamins" solution was a foldable wheel, which other designers have struggled to create. The Morph Wheel's rim is made of four sections that lock into a circle with hinges. Four gridded spokes are attached to the rim with pivots. All these parts are made of a plastic and glass fibre composite. An aluminium spoke that fits across the wheel's diameter keeps the wheel locked into shape. To fold the wheel, the user twists a small blue clip on the rim, which disengages the aluminium spoke and allows it to rotate 30 degrees. The hinges and pivots can then be activated, making it easy to squash the wheel into a long, narrow shape, following the way a rubber tyre can naturally bend. It will fit into a bag similar to a tennis racket bag. The "push rim," used to propel the chair, folds using the same technology. The wheel's hub will take any standard quick-release wheelchair axle. The product is made by Maddak, one of the US's biggest assisted-care manufacturers. It went on sale this week in the US priced $950 per pair.