War-Wheel

The War-Wheel was a massive battlecruiser used by the Sontarans. The ship looked like an axle with two wheels on its ends. It was armed with two space cannons, carried Sontaran shuttlecraft and was captained by an Admiral. (HOMEVID: Shakedown: Return of the Sontarans)

History
One War-Wheel was used in the pursuit of a Rutan spy. It moved to every intersecion point where the Rutan might be. (HOMEVID: Shakedown: Return of the Sontarans)

Sontaran Commander Steg intended to open a wormhole above Sentarion and send a War-Wheel through it to Ruta III, where it would kill the Rutan Queen. The Seventh Doctor closed the wormhole and trapped the War-Wheel inside. (PROSE: Shakedown)

Mr Kamen salvaged a host of technology from the wreckage of a War-Wheel on Earth. In addition, he found a Sontaran survivor who he would have modified to serve him as a mercenary in the 2010s. (AUDIO: Portrait of a Lady)

Behind the scenes

 * The War-Wheel resembles the ships of the Cyberman fleet seen in The Invasion, of which an homage design appeared in The Pandorica Opens and A Good Man Goes to War, with the former appearance being alongside a Sontaran flagship.