From the Super Mario Wiki
(Redirected from Mushroom (Mario Kart 7))
The Mushroom tires are a set of unlockable wheels in Mario Kart 7. As their name suggests, they're basically wheels that are shaped like actual mushrooms. Their stats are somewhat unusual in that their best strengths are their speed and handling, while their acceleration, weight, and off-road are hindered.
 Stat boosts
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