Shinko Mini Bike Trail 421 series Front/Rear Tire - 433 Tough nylon carcass with dimpled knobs to provide traction in a variety of terrains Open tread pattern cleans out well in muddy conditions Tube type The use of the tire and other vehicle data and information accessible through this webpage is limited to persons located in the United States of America and Canada.ALTHOUGH THE DATA IS BELIEVED TO BE ACCURATE, NO WARRANTY OR GUARANTEE IS MADE REGARDING THE QUALITY OR ACCURACY OF THE DATA.All data should be verified by a tire professional, the vehicle placard (typically located on an inside door panel or on frame), and/or the vehicle owners manual.