Photo 1 of Rippin Moto 90/90-21 or 80/100-21 (3.00 X 21) Heavy Duty Motorcycle Tube - Premium 3MM Thick Natural Rubber - TR4 Valve - Fits Most 21" Motocross and Dirt Bike Tires (3.00-21)

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Photo 1 of Rippin Moto 90/90-21 or 80/100-21 (3.00 X 21) Heavy Duty Motorcycle Tube - Premium 3MM Thick Natural Rubber - TR4 Valve - Fits Most 21" Motocross and Dirt Bike Tires (3.00-21)Photo 2 of Rippin Moto 90/90-21 or 80/100-21 (3.00 X 21) Heavy Duty Motorcycle Tube - Premium 3MM Thick Natural Rubber - TR4 Valve - Fits Most 21" Motocross and Dirt Bike Tires (3.00-21)