Here is a great value for you, our 12-1/2 x 2.75 dirt bike tire and tube set for the Razor MX350 & MX400. We took the 12-1/2 x 2.75 tire with knobby tread and matched it with the right inner tube, and offer this as a complete combo set.
This tire is not only compatible with the Razor MX350 and Razor MX400 dirt rocket, it is also used on the rear tire for the X-Treme X-560, and may be used on other scooters and dirt bikes as well.
Best of all -- the price!
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Proposition 65 Warning