The Thunder Number (サンダー号?) is Sandā-gōRai Kotaru's personal motorcycle which first appeared in episode 1 of the Toho tokusatsu television program, Warrior of Light Diamond Eye titled My Name is Diamond Eye.
The Thunder Number is Rai Kotaru's favored motorcycle which he utilizes both in travel and combat.
- The Thunder Number sometimes appears as a blue dirt-bike and a Honda, in different scenes. The reason for this isn't exactly known.