4.10/3.50-4 Inner Tube 2 Pack Heavy Duty Replacement Inner Tubes with TR-87 Bent Valve Stem for Wheelbarrows Mowers Hand Trucks

What It Is

This is a 2-pack of heavy-duty inner tubes sized 4.10/3.50-4, designed to replace worn or punctured tubes in wheelbarrows, lawn mowers, hand trucks, and other small-wheeled equipment with 4-inch rims. The TR-87 bent valve stem makes inflation easier on tight-access wheels (e.g., mower front casters).

Fitment & Compatibility

• Size: Only fits 4.10/3.50-4 tires (4-inch rim, 10-11 inch outer diameter). Not compatible with 4.00-4, 4.80-4, or 3.50-4 without cross-checking tire sidewall.
• Valve: TR-87 is a short, 90-degree bent metal stem (approx. 1.5” long). Works with wheels that have a valve hole near the rim edge, but may not clear some deep-dish wheelbarrow rims or mower hubs with tight clearance.
• Application: Common on walk-behind mowers (front wheels), 4-6 cubic foot wheelbarrows, and hand trucks. Not for riding mowers or larger tires.
• Check before buying: Remove your old tube and verify the tire sidewall stamp says “4.10/3.50-4” or “4.10×3.50-4.” Measure rim width (should be ~3.5”). Ensure the valve hole in your rim is at least 0.5” in diameter—TR-87 stems are thicker than standard straight stems.

Key Things to Know

• Quality: Heavy-duty rubber, but not puncture-proof. Use a tire liner if your mower runs over sharp debris.
• Installation: Moderate difficulty—requires removing the wheel, breaking the tire bead, and careful tube insertion to avoid pinching. A tire spoon or pry bar helps.
• Gotcha: The bent valve may not fit wheels with a deep center hub or those where the valve hole is recessed. Test fit before fully mounting.
• Durability: Rated for 15-25 PSI (typical for wheelbarrow/mower tires). Overinflation can blow the tube or slip the bead.

Should You Buy It

If you need a quick, affordable replacement for a 4.10/3.50-4 tube with a bent valve—and your rim has clearance for the TR-87 stem—this 2-pack is a solid value. Skip it if your tire size differs or your rim uses a straight valve.