Rumble Grumble and Spins are two members of the Speed Trux from the Dinotrux series. Rumble Grumble (voiced by Brian Drummond) is an Ankylodump who speaks only in unintelligible mutterings. Spins doesn't speak at all, and his name comes from his preferred method of attack: going into a spin that he uses to knock other Trux about during races or other confrontations.

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