PROPARTS 18x9.50-8 Lawn Mower Tires, 18x9.5x8nhs 4PR Turf Tire for Riding Lawn Mowers & Garden Tractor, Tubeless

What It Is

The PROPARTS 18x9.50-8 is a 4-ply rated (4PR) turf tire designed for rear or front axle use on riding lawn mowers and garden tractors. It’s a tubeless, non-highway service (NHS) tire intended for grass, dirt, and light turf applications—not pavement or high-speed towing.

Fitment & Compatibility

Before buying, verify these three measurements:

• Size: Must be exactly 18 inches tall, 9.50 inches wide, and fit an 8-inch rim. Measure your current tire’s sidewall markings—any variation (e.g., 18x8.50-8) means it won’t fit properly.
• Rim width: This tire fits 8-inch diameter rims, but rim width should be between 6 and 7 inches for optimal bead seating. Check your wheel’s stamped width.
• Load capacity: 4PR rating supports roughly 500–600 lbs per tire (check sidewall). Ensure combined axle load doesn’t exceed that, especially on heavy garden tractors with attachments.

Common brands using this size: Cub Cadet, John Deere, Husqvarna, Craftsman, MTD, and many zero-turn mowers with 18x9.50-8 OEM tires. Not for push mowers or small lawn tractors with smaller tire sizes.

Key Things to Know

• Tubeless design – No inner tube required, but the rim must be clean and free of rust for an airtight seal. Use a bead sealer if needed.
• Installation difficulty – Moderate. Mounting on a rim by hand is tough; a tire machine or pry bars and tire lube are recommended. Balancing isn’t critical for mower speeds.
• Tread pattern – Shallow, smooth turf tread won’t dig into lawns but can slip on wet grass or loose dirt. Not for off-road or muddy conditions.
• 4PR vs. 6PR – This is a 4-ply tire. If you carry heavy loads or tow, a 6PR (6-ply) tire may be better for puncture resistance. 4PR is fine for standard mowing.

Should You Buy It

Buy this tire if you need a direct replacement for an 18x9.50-8 turf tire on a riding mower or garden tractor used on lawns. It’s a solid value for the price, with good ratings for durability and fit. Avoid it if you need a 6-ply tire for rough terrain or heavy loads, or if your rim width is narrower than 6 inches.