10″x3″ (3.00-4, 260×85) Optional inner tube with a 90-degree angled valve stem Knobby Q113 tread for traction on soft or loose surfaces Here is the Qind Q113 Knobby tread version of the popular size 3.00-4 tire It is used mainly on stand up scooters but also found on a few models of go-karts and mini quad ATVs Here is the Qind Q113 Knobby tread version of the popular size 3.00-4 tire. It is used mainly on stand up scooters but also found on a few models of go-karts and mini quad ATVs. Because pneumatic tires usually require an inner tube, we offer this tire with the option of a matching inner tube. You can select the tire alone, or your tire combined with an inner tube that uses a 90-degree angled valve stem. This tire comes standard on the Avigo Extreme Dirt Rider electric scooter found at Toys ‘R Us. It can be used as a replacement on any application that was equipped with the standard smooth tread 3.00-4 tire for a more aggressive off-road look and to vastly improv