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; Oliver, Roland Anthony 1975.

One of the great technological puzzles of Sub-Saharan African economic history is that wheeled transportation was barely used prior to the colonial period.

from the original on 10 June 2020.

It is thought that Nubian waterwheels may have been ox-driven.

from the original on 22 August 2020.

This arrangement is the main topic of this article, but there are many other applications of a wheel addressed in the corresponding articles: when placed horizontally, the wheel turning on its vertical axle provides the spinning motion used to shape materials e.

- A type of permanently attached hinged panels for general extreme off-road use.

The invention of the solid wooden disk wheel falls into the late , and may be seen in conjunction with other technological advances that gave rise to the early.

29 December 2016 at the OUP Oxford.

For example, on a the is a large hoop attached to the outer ends of the spokes of the wheel that holds the tire and tube.

Wire spokes are under tension, not compression, making it possible for the wheel to be both stiff and light.