YeYouC Heavy-Duty Inner Tube 18/18.5x8.50-10 TR13 Valve - Reinforced Butyl, Fits 18–20" Tires

YeYouC heavy-duty 18/18.5x8.50-10 inner tube is a thick butyl replacement tube with a TR13 straight valve stem designed to fit 18–20" outer-diameter tires and provide improved air retention and durability for lawn tractors, ATVs, and utility trailers.

When you need a rugged tube that resists punctures, holds air longer, and fits a range of small utility tires, this YeYouC inner tube is built for the job. Constructed from reinforced butyl rubber and fitted with a TR13 straight valve stem, it replaces weakened or leaky tubes in garden tractors, lawn mowers, quad bikes, carts, and more. Confirm your tire's outer diameter and rim size before installing to ensure a proper fit.

Will this inner tube fit my 20x8-10 or 18x9.50-10 tire?

Yes — the tube is sized to accommodate outer diameters from 18 to 20 inches and rim diameters of 10 inches, covering common markings such as 18x8.50-10, 18.5x8.50-10, 20x8-10, 20x10.00-10, and 18x9.50-10. Always verify the existing tube or tire sidewall dimensions before purchase to avoid mismatch.

• Fits tires with 10-inch rim diameter (inner diameter).
• Compatible with outer diameters of 18–20 inches and widths of 8–10 inches.
• Check the sidewall stamp or current tube size for exact match.

How durable is the YeYouC butyl construction?

This inner tube is made from heavy-duty butyl rubber and manufactured thicker than standard tubes for enhanced puncture resistance and longevity. Butyl also improves airtightness compared with natural rubber, helping the tube maintain pressure between uses.

• Premium butyl compound for stronger tear and puncture resistance.
• 4x thicker construction versus typical tubes for extended life.
• Designed to retain air longer, reducing maintenance frequency.

What valve and inflation limits does the tube use?

The tube is fitted with a TR13 straight valve stem, a common valve type for tractor and small equipment tires. It supports inflation up to the stated maximum (check your tire's rating), offering reliable airflow access for pumps and compressors.

• TR13 straight valve stem compatible with standard tire pumps.
• Maximum inflation guidance listed by the manufacturer; follow tire sidewall PSI limits.
• Includes valve caps to protect the stem from dirt and damage.

How do I check and install the replacement tube correctly?

Before mounting, inflate the tube slightly and submerge in water to check for leaks; any bubbles indicate a puncture. When installing, ensure the rim and tire interior are free of debris, seat the bead evenly, and inflate carefully while checking alignment.

• Pre-inflate and water-test for leaks before final installation.
• Inspect rim and tire interior for sharp edges or residue.
• Use correct tire PSI and seat beads evenly to avoid pinches.

Who is this for: This YeYouC inner tube suits homeowners, landscapers, and light-equipment operators who need a durable, long-lasting replacement for 18–20" small utility tires. It’s ideal for lawn tractors, riding mowers, ATVs, garden carts, trailers, snow blowers, and other equipment where a thicker butyl tube with a TR13 valve improves uptime and reduces frequent inflations or roadside fixes. If you maintain small fleet equipment or prefer rugged aftermarket parts, this inner tube provides a strong, cost-effective option.