Dirt bike riders, don't get stuck with a flat! This is a brand new 21-inch front motorcycle inner tube from IRC. The size is 80/100-21, which is a super common size for the front tire on a huge range of dirt bikes. The listing specifically mentions it fits Kawasaki models like the KX125, KX250, KX250F, KX450F, KLX400, KLX, and KDX. But honestly, if your bike takes a 21\ front wheel with an 80/100 tire, this tube will likely work. Part number is IRC80. Brand new in its original packaging. Always smart to carry a spare tube (and the tools to change it) when you're out on the trails. A flat can end your day fast if you're not prepared. This is a quality replacement tube from a known brand. Whether you're fixing a puncture or just doing proactive maintenance when changing a tire, having the right tube on hand is key. Keep riding!