Road Thunder is a sentient, artificially intelligent motorcycle engineered for the Borgman Project. It serves exclusively as the combat vehicle and partner to cyborg warrior Ryo Hibiki.

This self-aware machine possesses advanced capabilities for battle. It functions as Ryo's primary transportation and transforms into his "last resort special weapon" during combat. The motorcycle is specifically designed to synchronize with Ryo's blue Baltector suit, optimized for speed and close-quarters combat.

Ryo activates its transformation sequence with the command phrase "BORG GET ON!" The vehicle is also known as "Super Thunder," suggesting potential upgraded configurations. Road Thunder remains operational throughout the original series and subsequent OVAs, consistently serving as Ryo's trusted mechanical partner.

Its sustained presence is confirmed in the OVA *Lover's Rain*, where Road Thunder continues to appear alongside Ryo. The motorcycle represents a key technological achievement of the Borgman Project, integrating artificial intelligence with specialized combat functionality to support cyborg warriors against interdimensional threats.