Save money 3.00-4 (10″x3″, 260×85) Aggressively knobby tire Angled valve stem Do you need a 3.00-4 Knobby style tire and inner tube set This size is commonly referred to as the 10″x3″ or the 260×85 Do you need a 3.00-4 Knobby style tire and inner tube set This size is commonly referred to as the 10″x3″ or the 260×85. Our 3.00-4 Knobby tire and inner tube set can be used on a large number of gas and electric scooters, as well Go Karts and utility carts. The knobby style allows you to veer into rougher terrain where your average tires can’t go.