Slime Balls Bullet Riot Vomit White 60mm, 97a wheels feature white 97a urethane with retro Slime Balls/Speed Wheels Bullet Riot artwork on our OG 60mm Vomit shape. Includes retro Bullet Speed Wheels prismatic sticker Slime Tech 97a all-terrain urethane offers a more forgiving durometer for rough terrain with easy, consistent power slides and bark you normally get with a harder urethane. Vomit wheels are an 80's style, wide, asymmetrical shape with a rounded edge on one side and a conical edge on the other giving you a choice of lock-in feel, with a wide riding surface for control on all terrain. Slime Balls Wheels: It's Always Slime Time.