Defense is a type that focuses on not being knocked out of the stadium. Defense wheels tend to be heavy and round. Good Defense wheels include Basalt, Earth, Death and other wheels like them. The aim of Defense types is to counter Attack types without losing stamina or getting knocked out. Defense Bottoms also add great Defense because they stay in place by gripping onto the stadium.
Defense types need a lot of weight so that they can counter attacks. MF-2 Heavy or any other metal face bolt helps in adding the extra weight. Also they need Balance so Cygnus/Bull/Aquario/Kerbecs Clear Wheels are vital. In addition to that, you need tips that can regain balance quite quickly, but still have a lot of stamina. WD, SD, EWD and PD are excellent for the job.
Combos like Basalt Bull TH170CS are used so that the Metal Wheel can smash down upon the opposing bey, which will knock them off balance. Also combos such as MF-2 Basalt Bull GB145/TR145/C145RS/RB/CS provide offensive movements that gives it great smash attack and defense.