IRC Mb90 Tires IRC Mb90 Motorcycle Tire has a superb grip with high-mileage durability. Features: Intended for use on small cc scooters Suited for varying weather conditions J-rated for speeds up to 62 mph Tubeless (Tl) Blackwall Bias construction 4-ply rating Notes : It is recommended to change your valve stem, tube and/or rim strip when installing a new tire. Shop Here!