2Pcs 4.10/3.50-4 Inner Tubes with TR-87 Valve Stem, Replacement Tire Tubes for Lawn Mowers, Wheelbarrows, Dollies, Trolleys & Small Utility Equipment (Fit 3.5-4.10 Wide)

What It Is

This is a set of two 4.10/3.50-4 inner tubes with TR-87 valve stems, designed to replace worn or punctured tubes in lawn mowers, wheelbarrows, dollies, trolleys, and other small utility equipment with 4-inch rims.

Fitment & Compatibility

Before buying, confirm your tire size is 4.10/3.50-4 (the first number is width, the second is rim diameter). This tube fits tires with a 3.5 to 4.10-inch width and a 4-inch rim. It is a universal aftermarket part—no specific brand or model needed. Check your current tube’s valve stem type: the TR-87 is a short, straight stem (about 1.5 inches long), common on small equipment. If your machine uses a bent or longer stem, this may not fit without modification. Measure your rim’s inner diameter (must be 4 inches) and ensure the tube’s width range matches your tire’s sidewall markings.

Key Things to Know

• Quality: Budget-friendly, but some users report thinner rubber than OEM tubes. Expect average durability for light-duty use.
• Installation: Moderate difficulty. You’ll need tire levers and a pump. Avoid pinching the tube between the rim and tire bead during install—use talcum powder to reduce friction.
• Valve stem: The TR-87 is short; if your wheel has a deep center hole or a hubcap, the stem may not protrude enough for easy inflation. Check clearance first.
• Size note: These tubes are slightly undersized for some 4.10-width tires—they fit best with 3.50-4 tires. Stretching them to a 4.10 tire can thin the rubber and increase puncture risk.

Should You Buy It

Buy this if you need a cheap, quick fix for a small flat tire on a wheelbarrow, dolly, or light-duty mower (under 200 lbs load). Avoid for heavy commercial mowers or rough terrain—spend more on thicker tubes for durability.