Cannot Add a Second Wii Wheel to One Remote in Mario Kart Wii

You cannot attach two Wii Wheels to a single Wii Remote. Each wheel is a plastic shell that holds one Wii Remote. Mario Kart Wii supports:

• 1 Wii Remote (+ Wheel) per player (up to 4 players).
• Alternative Controllers (per player):
  • Wii Remote + Nunchuk – Steer with stick, buttons for items/drift.
  • Classic Controller / Classic Controller Pro – Analog sticks, traditional layout.
  • GameCube Controller – Requires GameCube Controller Adapter (Wii U) or original Wii GameCube ports (launch Wii only). Best for precision.

To play 2-player, you need two Wii Remotes (each with its own Wheel, Nunchuk, or Classic Controller).