The Renewable Materials Company

Even the wheels are made of wood. The Splinter Car was inspired by a WWII aircraft, the de Havilland Mosquito, also made almost entirely out of wood.

“Wood has fantastic performance capabilities. It has a higher strength-to-weight ratio compared to aluminium or steel and you can use it in composite form like carbon fibre or fibreglass. It also takes very little energy to produce a piece of plywood compared to aluminium, steel or carbon fibre and it’s not oil-dependent but naturally renewable, sustainable and biodegradable,” says Joe Harmon, designer of the Splinter Car.

Sources:
http://www.joeharmondesign.com/
http://www.designboom.com/technology/joe-harmon-design-splinter-wooden-v8-sports-car-12-07-2015/