421 Mini Bike Trail A tough nylon carcass with dimpled knobs provides traction in a variety of terrains. Ideal for mini bikes. Open tread pattern cleans out well in muddy conditions DOT approved Not intended for extended highway use Tube type Spec Chart Related Products Show Advanced Specs Part # Size Speed Rating Load Index Recommended Rim Size Outside Diameter Width Max psi Tube Type List Price 87-4420 3.50-8 J 46 2.5 in. 15.2 in. 3.62 in. 36 psi Tube $29.95 87-4421 4.00-8 J 55 2.5 in. 16.34 in. 4.13 in. 36 psi Tube $31.95 87-4422 3.00-10 J 42 2.5 in. 16.26 in. 3.31 in. 36 psi Tube $28.95 87-4423 3.50-10 J 51 2.5 in. 17.2 in. 3.62 in. 36 psi Tube $33.95 You might also like 520 Series Tire The directional pattern of the 520 tire works well in intermediate to hard terrain. More Info Find a Dealer