Steel Driver

The Steel Driver is a kart from the Mario Kart series. The name is based on the game Steel Diver. In fact, its Japanese and Italian names are the Steel Diver. It is a submarine-like vehicle with a dark blue top and a red underside. When the kart goes underwater, the propeller will appear in the rear guard, much like an actual submarine. The emblem is located on the sides of the kart.

Mario Kart 8 / Mario Kart 8 Deluxe
The Steel Driver debuts in Mario Kart 8 as an unlockabke kart body. It has the same stats as the Badwagon, the Tri-Speeder, the Standard ATV, and the GLA. It boosts weight and traction, but lowers acceleration and handling.

In Mario Kart 8 Deluxe, it is now available from the start. In this game, it boosts speed and weight, but lowers acceleration and handling. It now shares stats with only the Tri-Speeder and Bone Rattler. CPU Iggy, Koopa Troopa, and Dry Bones are occasionally seen using this kart, paired with the Metal tires.

Mario Kart Tour
The Steel Driver returns in Mario Kart Tour, where it is classified as a High-End kart. It was added in at the start of the Mario vs. Luigi Tour. Performing slipstreams awards more points than usual when using this kart. It uses blue versions of the Metal tires from Mario Kart 8 and Mario Kart 8 Deluxe.

Names in other languages
Steel Driver U-Kart