Wheel
From The Bakugan Wiki
Wheels are found on certain Bakugan that change the Bakugan's Attribute or G-Power. Wheels give a random Attribute or G-Power. Bakugan with wheels are Preyas, Elfin, Dual Elfin Revolution, Elico, and the BakuTactix such as Infinity Helios and Mutant Elfin. Wheels can have three attributes, three G-Powers or nothing. Some Bakugan with Attribute Wheels, such as Preyas, can come with nothing on the wheel. When a Bakugan with a wheel stands, its result is treated as Spin.
