Mario Kart Wii Steering Wheel?
Mario kart wii comes with one steering wheel. Yes, you can buy the wheels by themselves. You can probably buy them at the same store you bought the game in.
The game comes with one steering wheel. Apparently you can buy them as stand-alones, but I haven't seen any in the stores around where I live. The wheel isn't all that useful. Most of the people I know either use the nunchuk, or the normal controller WITHOUT the Wii Wheel. Overall, it's mainly preference. Usually, controls for one person may not work for another.
The game comes with one WiiWheel, and you can buy them separately at the store for $15, but they're both in very high demand. I got the game when it first came out, but had to wait a few weeks before I happened upon an extra wheel. The Wheel is actually the best way to play the game. I see people who use the GC controller or Classic controller as wimps. Most of them find it too hard to change the way they play games, so they have to revert to the level of the PS3 or 360. If you keep using it, though, the Wheel is tons more fun.