The Dinka Enduro in GTA 6 is an off-road enduro motorcycle featured in the game as Jason's personal safehouse vehicle. It features an army-themed livery and boasts heavily updated, high-fidelity textures and suspension mechanics compared to its prior iteration in GTA Online.
The Dinka Enduro is tied to the GTA 6 Ultimate Edition. Standard players won't have access to this specific variant natively unless they purchase the upgraded edition, where it unlocks progressively as you complete chapters in the main story.