Here the air chamber for mini bike, dirt bike, pit bike ... TDH 2day. Width from 4.00 to 4.50 for rims of 12 inches. Ideal in case of puncture!
It is therefore ideal with tire sizes 120/130/14 // 70-12, 120/130 // 80-12 or 110 / 90-12 or 130/140 // 60-12!