Naturally, since driving a kart requires a wheel, I ended up being finagled into buying the set. The Nintendo Joy-Con Wheels come in a set of two, and work perfectly with the Switch’s controllers. The wheels hold the Joy-Cons snugly and securely, and make controlling the drifting (SR button) and item throwing (SL Button) feature of the game …
https://www.amazon.com/Nintendo-Joy-Wheel-Set-Switch/dp/B06XJBVSLY

