https://www.morrowtire.com/4-inch-rim-diameter-tire-inner-tubes/30-280-4-carlstar-carlisle-tire-inner-tube-js87p-inline-stem.html
2.80/2.50-4 Carlisle Tire Inner Tube JS87P Inline stem
Fits Sizes: 2.50-4, 2.80/2.50-4, 2.80-4, 3.00-4, 8X3.00-4, 9X3.50-4 Tube will be identified with: 2.80-4 JS87P MPN: 320010
tire inner tubecarlisle