You get a flat, and under the carpet in the trunk is a donut spare tire. You know, the temporary spares that are much skinnier than the tires on your car, with a prominent warning about maximum ...

Big promises, but the Donut Motor's horsepower, along with an incredible quoted torque output of 3,171 lb-ft, is an amazing ...

Donut Lab's new electric motor has a better power-to-weight ratio than Koenigsegg's Dark Matter motor, and is fully ...

Today’s cars use a donut tire for a couple of reasons. According to Reina, it helps keep the overall weight of the car down, which improves fuel economy. And it’s also just less expensive.