GICOOL 20x8.00-8, 20x10.00-8 Inner Tubes, 2 Pack with TR-13 Valve Stem, Heavy-Duty Replacement Tubes for Lawn Mowers, Tractors, Riding Mowers, Golf Carts, Scooters, Go Karts, Wagons, Garden Trailers

What It Is

This is a 2-pack of heavy-duty inner tubes (20x8.00-8 and 20x10.00-8) with TR-13 valve stems, designed to replace worn or punctured tubes in lawn mowers, tractors, riding mowers, golf carts, scooters, go karts, wagons, and garden trailers.

Fitment & Compatibility

• Check your tire size – These tubes fit tires marked 20x8.00-8 or 20x10.00-8. Measure your tire’s sidewall markings (e.g., “20x8.00-8”) to confirm. The tube stretches to fit either width, but it won’t work with 20x7.00-8 or 20x11.00-8 tires.
• Valve stem type – TR-13 is a short, straight stem (approx. 1.5” long). Ensure your wheel rim has a hole that accommodates this style. If you need a 90° angled stem (common on zero-turn mowers with tight clearance), this won’t fit.
• OEM vs. aftermarket – No specific brand compatibility needed; tubes are universal by size. Works with any wheel that uses a 20” diameter tire (8” rim) and a standard TR-13 valve hole.
• Measure rim width – Accepts rims 6” to 8” wide. Confirm your rim width is within this range to avoid pinching or loose fit.

Key Things to Know

• Quality – Heavy-duty rubber (0.085” thickness) is thicker than many budget tubes, but some users report premature sidewall cracking after 1-2 seasons in hot climates. Inspect regularly.
• Installation difficulty – Moderate. You’ll need tire irons and a bead breaker. Watch for pinching the tube between the rim and tire bead during installation—use baby powder or soapy water to reduce friction.
• Common gotcha – The TR-13 stem is straight and short. If your wheel has a deep offset or a tight hub, you may struggle to attach an air chuck. Consider a flexible extender if clearance is tight.
• 2-pack value – Cheaper per tube than buying singles. Keep the spare for quick swaps if you have multiple machines with the same tire size.

Should You Buy It

If you have a 20x8.00-8 or 20x10.00-8 tire on a lawn tractor, mower, or cart and need a durable, budget-friendly replacement tube, this 2-pack is a solid choice—just confirm your valve stem clearance and rim width first. Avoid if you require an angled valve stem or need a tube for a different tire size.