PROPARTS 18x9.50-8 Lawn Mower Tires and Wheel Assembly, 18x9.5x8 nhs Turf Tires with Rim for Riding Lawn Mowers & Garden Tractor, 4 Lugs on 4" PCD, Center Hole 2.83", Tubeless, Set of 2, 4PR

What It Is

This is a set of two 18x9.50-8 turf tires pre-mounted on 4-lug rims, designed for riding mowers and garden tractors that require smooth, low-ground-pressure traction on lawns without damaging turf.

Fitment & Compatibility

Before buying, verify three critical measurements on your current wheel:

• Bolt pattern: 4 lugs on a 4-inch PCD (center-to-center across opposite lugs). Common on many Craftsman, Husqvarna, MTD, and John Deere models, but not universal.
• Center hole: 2.83 inches (72mm). Must match your axle hub’s pilot diameter exactly—too small won’t fit, too large causes wobble.
• Tire size: 18x9.50-8 (18" diameter, 9.5" wide, 8" rim). Check for clearance against your mower deck, frame, and fenders, especially if upgrading from a narrower tire. This is a 4-ply (4PR) tubeless tire rated for 475 lbs each at 14 psi.

Cross-reference with OEM part numbers like 590-06208 or 490-501-003, but always measure yourself—aftermarket rims can vary slightly in offset.

Key Things to Know

• Installation is bolt-on—no tire mounting or balancing needed. Just jack up the mower, remove lug nuts, swap wheels, and torque to 45-55 ft-lbs.
• Tread is shallow turf style—excellent for grass, poor in mud or loose soil. Not for aggressive terrain.
• 4PR rating means moderate puncture resistance. Fine for lawns, but avoid heavy debris or rocky yards.
• Common gotcha: The valve stem position may not match OEM—ensure it’s accessible for inflation after mounting. Some users report needing a 90-degree valve stem adapter.

Should You Buy It

If you need a direct replacement for a worn-out rear tire on a typical riding mower with a 4-on-4-inch pattern and 2.83" center hole, this is a solid, affordable choice. It’s ideal for flat or gently sloped lawns, not for heavy-duty garden tractors or rough terrain. Check your measurements first, and you’ll save time and frustration.