20x8.00-8 Inner Tube,20x8-8,20x10.00-8 Tire Tube,20x10-8 for Lawn Mower,Golf Cart,Garden Tractors,Motorcycles,Lawn Tractor,Wheelbarrow,with TR-4 Straight Valve Stem 2 Packs

What It Is

This is a 2-pack of 20-inch inner tubes designed to replace worn or punctured tubes in lawn mowers, garden tractors, golf carts, wheelbarrows, and some motorcycles. They use a TR-4 straight valve stem (common for smaller tires) and fit tires sized 20x8.00-8, 20x8-8, 20x10.00-8, or 20x10-8.

Fitment & Compatibility

Before buying, confirm these three things:

• Tire size on sidewall: Must be 20x8.00-8, 20x8-8, 20x10.00-8, or 20x10-8. The “20” is the tire diameter (inches), “8” or “10” is the width, and “-8” is the rim diameter. This tube fits both 8-inch and 10-inch wide tires because the tube stretches to fill the space.
• Rim diameter: Your wheel rim must be 8 inches (marked as “-8” on the tire). If your rim is 7 or 9 inches, this tube won’t work.
• Valve stem type: The TR-4 straight stem is standard for most lawn mowers and garden tractors. But if your mower uses a TR-13 (short angled) or TR-6 (long straight) stem, you’ll need a different tube.

No special brand or model check needed—this is a universal aftermarket tube. OEM vs aftermarket doesn’t matter as long as the size matches.

Key Things to Know

• Quality: Heavy-duty rubber with consistent thickness. Users report no premature leaks or thin spots.
• Installation difficulty: Easy if you have tire spoons and a bead breaker. Expect 15–30 minutes per tire. Hardest part is avoiding pinching the tube between the rim and tire bead.
• Common gotcha: Over-inflation can cause the tube to bulge at the valve stem base. Stick to 15–20 PSI for most lawn mowers.
• 2-pack value: Buying two at this price is cheaper than single tubes at many local shops.

Should You Buy It

If you need to replace a flat or cracked tube on a 20-inch lawn mower or garden tractor tire, this is a solid, affordable choice. The 4.9-star rating and low price make it a no-brainer for DIY maintenance. Skip it only if your tire size is different or you need a specialized valve stem angle.