4.10/3.50-4 Heavy Duty Replacement Inner Tube with TR-87 Bent Valve Stem (2-Pack) - for Wheelbarrows, Mowers, Hand Trucks and More 3.50-4 Tire

What It Is

This is a heavy-duty replacement inner tube (2-pack) sized 4.10/3.50-4, built for wheelbarrows, lawn mowers, hand trucks, and similar small-wheel equipment. It uses a TR-87 bent valve stem for easier inflation in tight spaces.

Fitment & Compatibility

Before buying, confirm your tire’s size is 3.50-4 or 4.10/3.50-4. This tube fits any tire with those markings, regardless of brand. It does not fit 4.00-6, 4.80/4.00-8, or other sizes. Check your existing tire sidewall for the exact size. The TR-87 stem is a 90-degree bent metal valve, common on mowers and wheelbarrows—if your wheel has a straight or rubber stem, this will still work but may require a different mounting angle. No specific mower brand or model restrictions; it’s universal for any 3.50-4 tire.

Key Things to Know

• Installation difficulty: Moderate—you’ll need tire irons or spoons to break the bead and remove the old tube. No special tools beyond that.
• Valve stem clearance: The TR-87 is bent, so ensure your wheel hub or rim has enough space for the stem to protrude without kinking. On some tight wheels, you may need to rotate the tube slightly.
• Heavy-duty construction: This tube is thicker than standard tubes, reducing puncture risk but adding slight weight. Works well with pneumatic tires on rough terrain.
• 2-pack value: Two tubes for ~$10 means a spare for another wheel or a backup. Check your tire’s age—old tires may have internal cracks that can damage a new tube quickly.

Should You Buy It

If you need a reliable, affordable replacement for a 3.50-4 tube on a mower, wheelbarrow, or hand truck, this 2-pack is a smart buy—especially if you’ve had punctures before. It’s not for tubeless tires or different sizes, but for its intended fit, it’s durable and easy to install with basic tools.