The assembly has a greater load carrying ability as compared to a single wheel.
Each had a single wheel in front which was steered by a tiller.
He was able to make out a single wheel and something that undulated above the light.
The final drive was by propeller shaft to the single rear wheel.
By putting the single wheel in front, he avoided that hazard.
The single wheel seemed to flow rather than merely revolve.
It had standard wings and single wheels, like the Lim-5 fighter.
The motor drives the car's single rear wheel by means of a chain.
But without our brain and muscle not a single wheel can turn.
Its weight limitation for a single wheel is 25,000 lbs.