These systems, usually with one motor per driving wheel, need an additional top level controller which performs the same task as a mechanical differential.

It weighs 24 to 40 kg (53 to 88 lbs) per wheel.

Lowrider bicycles may have as many as 144 spokes per wheel.

The ship's wrought-iron paddlewheels were 16 feet in diameter with eight buckets per wheel.

The sand is stored in eight containers, one per wheel, on the undercarriage.

The front suspension is a multi-link design with four individual control arms per wheel.

For the pitstops, only two mechanics per wheel are allowed.

The car will have four electric motors, one per wheel.

However, now two coil springs rather than one were fitted per wheel.

He offered to pay Snow two dollars per wheel.