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, Rock, and other wheels like that. 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. Its usually best to use a high spin track like 145 and 170 and 230 for defense combos becuase opposing enemies cant reach the energy ring or fusion wheel.
It can counter Attack Types without problem, although not works all of the time. However Defense are known to have a terrible Stamina, and Stamina can counter Defense Types. Defense Type has a hard time retaining Stamina, so Defense Types are not for used against Stamina Types.