AR-PRO 13 x 4.00-6" (4.10/3.50-6") Heavy Duty Replacement Inner Tube with TR-13 Straight Valve Stem (4-Pack) - for Wheelbarrows, Mowers, Hand Trucks and More

What It Is

This is a pack of four heavy-duty inner tubes sized 13 x 4.00-6" (also marked 4.10/3.50-6") with a TR-13 straight valve stem. They’re designed to replace worn or punctured tubes in wheelbarrows, lawn mowers, hand trucks, and other small-wheeled equipment that use a 6-inch rim.

Fitment & Compatibility

Before buying, confirm your tire’s sidewall markings match 13 x 4.00-6 or 4.10/3.50-6. The tube fits any 6-inch diameter rim with a width between 3.50 and 4.10 inches. Common applications include walk-behind mowers (e.g., Toro, Honda, Craftsman), wheelbarrows, and utility carts. The TR-13 valve stem is straight and about 1.5 inches long—check that your wheel’s valve hole aligns (most standard wheels do). This is a universal aftermarket tube, not an OEM-specific part, so it works across brands as long as the tire size matches.

Key Things to Know

• Quality: Heavy-duty rubber with a thicker wall than standard tubes, reducing puncture risk. The TR-13 valve is metal-core and durable, but ensure it’s not too long for your wheel well.
• Installation: Moderate difficulty—you’ll need tire spoons or pry bars to remove the tire. Lubricate the tube with soapy water to avoid pinching between rim and tire bead.
• Common gotcha: The 4-pack is cheaper per tube than singles, but if you only need one, you’ll have spares. Always check the old tube for rim rust or sharp debris that could damage the new one immediately.
• Valve stem note: TR-13 is standard for most mower and wheelbarrow wheels, but some older models use a short, bent stem—measure your current stem length before ordering.

Should You Buy It

Buy this if you own multiple 6-inch wheel machines (e.g., a mower and wheelbarrow) and want a cost-effective, heavy-duty replacement that outlasts budget tubes. It’s ideal for DIYers comfortable with tire changes, but skip it if you need a single tube or a specific OEM fit—buy one individually instead.