2 Pcs 4.10/3.50-4" Replacement Inner Tubes, Heavy Duty Inner Tubes For Such As Lawn Mowers, Trailers,Trolleys,Wheelbarrows, Snow Blowers, And More, Garden Cart,Tractor

What It Is

This is a set of two heavy-duty 4.10/3.50-4" inner tubes designed to replace worn or punctured tubes in pneumatic tires on lawn mowers, garden carts, wheelbarrows, snow blowers, trailers, and tractors. They serve as the air-holding bladder inside the tire, not the tire itself.

Fitment & Compatibility

Before buying, confirm your tire size is marked 4.10/3.50-4, 3.50-4, or 4.10-4 on the sidewall. These tubes fit wheels with a 4-inch rim diameter and are common on walk-behind mowers (e.g., MTD, Troy-Bilt, Craftsman), small utility trailers, and wheelbarrows. They are aftermarket replacements, not OEM-specific, so they work across brands as long as the tire size matches. Measure the existing tube’s valve stem length and angle (straight vs. 90-degree) if your rim has limited clearance. These tubes typically include a standard TR13 (straight) valve stem.

Key Things to Know

• Heavy-duty construction: Made from thicker rubber than standard tubes, reducing puncture risk in rough terrain or heavy loads.
• Installation difficulty: Moderate. You’ll need to remove the tire from the rim, deflate the old tube, and reseat the new one. A tire spoon or pry bar helps, but avoid pinching the tube during installation.
• Valve stem style: Straight valve stem works for most mowers and carts, but check if your rim requires a bent or angled stem (common on some zero-turn mowers or trailers with hubcaps).
• Two-pack value: Priced at $7.99 for two tubes, it’s cost-effective for replacing both front tires on a mower or keeping a spare. However, verify the valve stem cap is included (some packs omit it).

Should You Buy It

Buy these if you need a budget-friendly, heavy-duty replacement for a 4-inch rim pneumatic tire on a mower, cart, or small trailer, and you’re comfortable with basic tire work. Skip them if your rim requires a specific valve stem angle (e.g., 90-degree) or if you need a tube for a larger wheel size (e.g., 5-inch or 6-inch rim).