20x8.00-8 20x10.00-8 Inner Tubes, 2 Pack Heavy Duty Replacement Tire Inner Tubes 20x8-8, 20x10-8 with Straight Valve Stem for Lawn Mowers, Tractors, Hand Trucks, Wheelbarrows, Trolleys, Wagons

What It Is

This is a 2-pack of heavy-duty inner tubes sized 20x8.00-8 or 20x10.00-8, designed to replace worn or punctured tubes in lawn mowers, garden tractors, hand trucks, wheelbarrows, trolleys, and wagons. They feature a straight valve stem for easy inflation and are built to handle the weight and rough terrain of outdoor equipment.

Fitment & Compatibility

Before buying, confirm your tire’s sidewall marking—this tube fits both 20x8.00-8 and 20x10.00-8 tire sizes (the width range accommodates either). The tube’s 8-inch rim diameter must match your wheel’s rim size. It works with most residential and commercial zero-turn mowers, riding mowers, and small utility trailers, but is not a direct OEM replacement for specific brands like John Deere or Cub Cadet. Measure your old tube’s valve stem type: this one is straight, not angled or offset. If your tire uses a 90-degree or TR13-style valve, this won’t fit without modification. Always check the inside diameter of your tire—some 20x8-8 tires have a narrower bead seat that may cause pinching.

Key Things to Know

• Quality: Heavy-duty rubber construction resists punctures better than standard tubes, but still prone to pinch flats if installed with a damaged tire.
• Installation difficulty: Moderate—requires removing the tire from the rim, cleaning the rim edge, and carefully seating the tube to avoid twisting. Use tire irons and talcum powder to reduce friction.
• Common gotcha: The included straight valve stem may be too short for some deep-dish rims or mower decks. Check clearance before mounting.
• Two-pack value: Cost-effective if you need to replace both rear tires on a mower, but one tube may be wasted if only one tire is damaged.

Should You Buy It

If you have a 20x8-8 or 20x10-8 tire with a straight valve stem and need a budget-friendly, durable replacement for a mower or utility cart, this two-pack is a solid choice. Avoid it if your rim requires an angled valve or if you’re not comfortable with DIY tire removal—you’ll save time paying a shop for installation.