Tire

Tires are vehicle parts that appears in all the Mario Kart installments, but are only customizable in Mario Kart 7, Mario Kart 8 and Mario Kart 8 Deluxe. Tires alter the speed, acceleration, and weight stats. The tires have changed constantly throughout the two games, varying in size and features.

Mario Kart 7
The tire customization first appears in Mario Kart 7. Each tire affects the speed and weight of the vehicle.

Mario Kart 8 / Mario Kart 8 Deluxe
Tire customization returns in Mario Kart 8 and Mario Kart 8 Deluxe. The stats have not changed much from the previous game, but in anti-gravity the speed and handling are affected. In addition to the new tires, every customizable tire from Mario Kart 7 excluding Mushroom and Red Monster reappears in this game.

Mario Kart Tour
In Mario Kart Tour, tires cannot be customized unlike previous entries. However, the tires of a kart are not a part of each kart's model, but instead their own models loaded for each specific kart. The names of each tire is the internal file name.