Roller

The Roller tires are a set of default tires in Mario Kart 7. They're the smallest wheels in the game, and they offer the best acceleration and handling boosts among all the kart parts. However, they also offer the lowest speed and weight boosts.

Stat boosts

 * Speed: -0.75
 * Acceleration: +0.75
 * Weight: -1
 * Handling: +2
 * Off-Road: -1.25