Rollarm Unit

Rollin' rollin' rollin'

Rollarm Units are a type of Decepticlone from the Transformers (PS2) video game.

The only Decepticlone type capable of transformation, Rollarm Units curl up into armored wheels to cover large stretches of ground in a short amount of time. Their treaded wheel-surfaces deflect energy blasts with ease, making tackling them tricky. They attack with rapid-fire laser blasts.

Rollarm Units curl up in a ball to pursue Autobots

From Teletraan I: The Transformers Wiki, a Wikia wiki.