From the Super Mario Wiki
Retro Off-Road is a set of unlockable tires and is the palette-swapped counterpart tires of the Off-Road tires that appear in Mario Kart 8 and Mario Kart 8 Deluxe. Like other palette-swapped tires in the game, the stats these tires offer are identical to the other version, with these tires providing no advantages or disadvantages. Instead of being black with red and white rims, the Retro Off-Road tires are white with red rims. They resemble the colors of the NES and Famicom. They share their stats with the Standard, Blue Standard, Off-Road and the GLA Tires.
In Mario Kart 8 Deluxe, the Retro Off-Road tires still share their stats with the Off-Road tires, but the only other tires they share their stats with are the Triforce Tires. As a result, the Retro Off-Road tires now boost the ground speed, water speed, weight and traction stats while reducing the acceleration, ground handling, water handling, anti-gravity handling and miniturbo stats.
Mario Kart 8
Mario Kart 8 Deluxe
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