Pedrail wheel
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The pedrail wheel is a type of all-terrain wheel developed in the late 19th and early 20th century by Londoner Bramah Joseph Diplock. It consists of a series of "feet" connected to pivots on a wheel.
An advanced design pedrail wheel climbing stairs.
1904 illustration of H. G. Wells' December 1903 The Land Ironclads, showing huge ironclad land vessels, equipped with pedrail wheels.
Dreadnaught wheel
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A dreadnaught wheel is a wheel with articulated rails attached at the rim to provide a firm footing for the wheel to roll over. These wheels have also been known as "endless railway wheels" when fitte
Bottrill's "Big Lizzie" with dreadnaught wheels
Illustration from Bottrill's 1912 patent filing in the United Kingdom