Donut Lab's circular motors fit inside tyres for "out of this world" performance

[Celerity]

https://www.dezeen.com/2025/05/05/donut-labs-circular-inwheel-motors/



Technology company Donut Lab has created a range of doughnut-shaped motors that fit directly inside a vehicle's wheels and enhance performance by removing the need for traditional powertrain systems. The circular motors form part of a modular platform of components created by Donut Lab to support the manufacturing of high-performing electric vehicles.



The motors can be integrated into a tyre to provide direct power to the wheel while reducing space and weight. This allows for enhanced energy transfer and greater output with lower energy consumption. The family of five motor models includes different sizes to suit vehicles from cars and trucks to motorcycles and scooters, as well as a small version for use in drones.



Donut Lab suggested that the motors could enable vehicles to break world records and described it as "by any yardstick the world's best electric motor". "Its performance capability is out of this world," said CEO Marko Lehtimäki. Donut Lab developed the products as an alternative to traditional powertrains consisting of an engine, transmission and driveshaft. These systems can be expensive to manufacture and maintain, while adding weight and complexity to the vehicle.



Combining the motor and the tyre removes the need for a separate powertrain, resulting in a more straightforward design with fewer components. This set-up helps lower the vehicle's unsprung mass – the weight associated with wheels, tyres, brakes and other components not supported by the suspension system. With fewer moving parts, direct drive technology can reduce costs and overall complexity, meaning less maintenance and more reliable performance over time.

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