AR-PRO 4.00-6 Flat-Free Solid Tire & 13" Wheel Assembly — 5/8" Sealed Bearings, 500 lb Capacity

AR-PRO's 4.00-6 flat-free 13" solid tire and wheel is a heavy-duty replacement assembly that eliminates flats and routine inflation for wheelbarrows, garden carts, hand trucks, and utility wagons.

This solid polyurethane tire and welded-steel wheel assembly replaces standard pneumatic 4.00-6 tires with a durable, maintenance-free option. Built with double-sealed bearings and reinforced construction, it’s engineered to roll smoothly across lawns, gravel, soil, and typical yard surfaces while supporting everyday loads up to 500 pounds in dynamic operation. The hub is designed to adapt to several axle setups, making it a practical upgrade for a wide range of outdoor equipment.

Will this tire fit my wheelbarrow or garden cart?

The AR-PRO flat-free 4.00-6 is sized for equipment that uses 4.00-6 tires and a 13" wheel. Fit depends on three measurements: tire diameter/width, axle diameter, and hub length—so measure your existing wheel before ordering. The assembly includes pre-installed 5/8" sealed bearings and extra spacers to accommodate several configurations.

• Tire size: 4.00-6 (13" wheel diameter).
• Standard pre-installed bearings: 5/8" sealed.
• Hub center length: 1.8" centered hub with additional spacer options.
• Accepts bearings/spacers for hub fits ranging from 1.8" to 6.8" when configured properly.

How durable is the AR-PRO solid polyurethane construction?

This wheel uses reinforced solid PU (polyurethane) designed to resist punctures and everyday wear, removing the need for inflation and reducing downtime. The rim is reinforced welded steel and the bearings are double-sealed to keep out dirt and moisture for longer life under typical yard and jobsite conditions.

• Solid polyurethane body: no tube, no flats.
• Reinforced welded-steel rim for structural strength.
• Double-sealed bearings to protect against debris and moisture.
• Deep tread pattern for improved traction on common surfaces.

What load can this wheel safely carry and how should I use it?

The AR-PRO 4.00-6 assembly is rated for dynamic loads up to 500 lbs during normal rolling and transport. It’s intended for moving yard materials, tools, mulch, and other payloads while in motion; it is not designed for prolonged static loading where weight sits stationary on the wheel for long periods.

• Dynamic load rating: up to 500 pounds under normal use.
• Ideal for transporting soil, firewood, mulch, and tools.
• Not intended for constant static load-bearing applications.
• Use with compatible axle diameter and properly configured spacers/bearings.

How easy is installation and what hub options are included?

Installation is straightforward when you confirm axle diameter and hub length first. The wheel ships with 5/8" sealed bearings installed and includes extra 3/4" bearings and spacers to support hub configurations from approximately 1.8" to 6.8", allowing the wheel to match several axle setups when assembled correctly.

• Pre-installed 5/8" sealed bearings for quick fitment.
• Includes additional 3/4" bearings and spacers for alternate axle setups.
• Hub adjusts to span hub lengths between roughly 1.8" and 6.8" when configured properly.
• Confirm measurements before purchase for a hassle-free install.

Who is this for: The AR-PRO Flat-Free 4.00-6 Solid Tire and Wheel is designed for homeowners, landscapers, gardeners, and small business operators who want a maintenance-free wheel replacement that avoids flats and frequent inflation. Choose this wheel if you need rugged, puncture-proof rolling performance for wheelbarrows, utility carts, hand trucks, and similar outdoor equipment—provided you verify tire size, axle diameter, and hub length before ordering.