9x3.50-4" Flat Free Tires, Lawn Mower Wheels Fits for King Kutter Finish/Zero-Turn Mower/Tractors/Wheelbarrows/Garden Carts, 3/4" or 5/8" Bushing, 3.4"-4''-4.5''-5" Centered Hub, 2 Pack

What It Is

This is a set of two 9x3.50-4” flat-free (never-flat) tires with a centered hub, designed for zero-turn mowers, finish mowers (like King Kutter), tractors, wheelbarrows, and garden carts. They eliminate punctures and maintenance, suited for light-to-medium duty use on flat, hard surfaces.

Fitment & Compatibility

Before buying, verify these three measurements:

• Tire size: Must be 9x3.50-4” (9” outer diameter, 3.5” width, 4” rim diameter). Measure your current tire’s sidewall stamp.
• Hub center hole: The hub is centered and accepts a 3/4” or 5/8” bushing. Measure your axle diameter (common on zero-turns and carts). If your axle is 1/2” or 1”, these won’t fit without modification.
• Bolt pattern: The hub has 4 holes spaced for 3.4”, 4”, 4.5”, or 5” center-to-center. Measure your wheel’s bolt circle. King Kutter finish mowers often use 4” or 4.5” patterns, but check yours.

These are aftermarket, not OEM. No model-specific fit guarantee—measure first.

Key Things to Know

• Quality concerns: Rating is 3.3 stars (19 reviews). Some users report the hub holes don’t align perfectly (drilling may be needed) or the rubber is stiff, reducing traction on grass vs. pneumatic tires.
• Flat-free tradeoff: No punctures, but the ride is harsher and grip is worse on wet grass or slopes. Best for paved or firm dirt surfaces.
• Installation: Simple bolt-on if hub matches. If not, you may need to re-drill holes or use a different bushing. No inflation needed.
• Weight limit: Each tire supports ~150-200 lbs. Avoid on heavy zero-turn mowers (500+ lbs total) or rough terrain—they can deform or crack.

Should You Buy It

Buy these if you need a cheap, maintenance-free replacement for a finish mower, wheelbarrow, or garden cart used on flat, hard ground and don’t mind a stiff ride. Skip them if you need strong traction on grass/lawns, have odd axle sizes, or want long-term durability—look for pneumatic or higher-rated flat-free options instead.