This inner tube model is 4.10/4.50-18 Inner Tube, Compatible with 18-inch rims and tires between 4.10 and 4.50 inches wide (4.10-18 4.50-18 110/100-18, 110/90-18, 110/80-18, 120/90-18, 120/80-18, 100/100-18).
Size Compatibilit: Fits most dirt and pit bikes with 18-inch rims and tires between 4.10 and 4.50 inches wide, suitable for models including Yamaha TTR230/TTR250, Honda CRF230/CRF250, and more.