HIKYROKY 13-inch (4.00-6) Flat-Free Polyurethane Tire & Wheel 2-Pack — Solid PU, Steel Hub with 5/8 in Ball Bearings

These HIKYROKY 13-inch flat-free polyurethane tires with steel hubs replace 4.00-6 pneumatic wheels, delivering puncture-proof performance for garden carts, hand trucks and small generators.

Replace worn pneumatic wheels with a maintenance-free alternative: each two-pack includes 13" diameter, 3.15" wide polyurethane tires mounted on thick steel hubs with a 5/8" axle hole and built-in ball bearings. The airless design prevents flats and reduces downtime, while polyurethane offers oil, acid and alkali resistance plus long-term elasticity similar to pneumatic tires. A grease nipple on the hub helps you keep bearings lubricated for smoother rolling and extended life.

How durable are these flat-free polyurethane wheels?

HIKYROKY polyurethane resists punctures, chemicals and degradation better than standard rubber replacements. Expect longer service life under normal use thanks to the solid PU compound and reinforced steel hub construction.

• Polyurethane tread resists oil, acid and alkali.
• Solid, puncture-proof design eliminates flats and leaks.
• Thick steel hub with ball bearings improves load distribution.
• Grease nipple allows periodic lubrication to extend life.

Will these wheels fit my cart, lawn wagon, or generator?

These wheels are sized for applications that accept a 13" (4.00-6) replacement and a 5/8" axle diameter. Check your existing tire's overall diameter, width and axle bore before purchase to ensure a correct fit.

• Overall diameter: 13 inches; tire width: 3.15 inches.
• Steel hub length: 2.16 inches for secure mounting.
• Axle hole: 5/8" (0.625") — confirm your axle size first.
• Common uses: garden wagons, hand trucks, light generators, lawn equipment.

How do these tires perform on different surfaces?

The upgraded tread pattern improves traction and stability across dirt, gravel and paved surfaces. The solid PU construction provides shock absorption similar to air-filled tires while maintaining consistent handling without pressure checks.

• Textured surface increases grip and reduces slip.
• PU compound cushions impacts for smoother rolling.
• Reliable on uneven terrain and yard surfaces.
• Ideal for light to medium-duty loads — avoid static heavy overloading.

What maintenance is required for these replacement wheels?

Maintenance is minimal compared with pneumatic tires: keep hubs lubricated via the grease nipple and periodically inspect for debris or hub wear. Because they are airless, there’s no need to monitor pressure or repair punctures.

• Apply grease through the nipple occasionally for bearing longevity.
• Clean tread and hub to remove embedded debris.
• Check axle fit and fasteners before each season of heavy use.
• No inflation or patching ever needed — reduces upkeep time.

Who is this for: DIYers, landscapers and small-equipment owners who want a hassle-free, puncture-proof wheel replacement for garden carts, hand trucks, small generators and similar tools. If you need a 13" (4.00-6) wheel with a 5/8" axle bore and prefer long-lasting, chemical-resistant polyurethane over pneumatic tires, this HIKYROKY two-pack is built to reduce downtime and maintenance while providing stable, slip-resistant performance.