its because its more expensive for the right size, so they streatch the tires, alot of drifters do it becuase it decreases traction surface.

also they arent bags, they are coilovers, ive only see 2 or 3 different vans i have seen have bags, adn bags are MAD expensive. Or they might be, never know, but its rare

used tires are so cheap here, its not even funny, i can get em 10 bucks a tire with 60% tread