AR-PRO 9x3.50-4 Flat-Free PU Tire & Wheel Assemblies — 4-Pack, 3/4" Bushing, Centered 3.5" Hub

These AR-PRO 9x3.50-4 flat-free polyurethane tire and wheel assemblies are a 4-pack replacement kit engineered to fit 3.50" width, 4" rim diameter wheels with 3/4" bushings and a centered 3.5" hub for reliable, puncture-resistant use on lawnmowers and small equipment.

If you’re replacing worn pneumatic tires or want to eliminate flats on a walk-behind mower, garden cart, generator, or small trailer, this kit supplies four solid PU tires mounted on steel wheels plus a universal adapter pack to help with installation. The polyurethane construction offers rubber-like traction while resisting cuts, UV damage, and weathering. Each assembly is rated for typical homeowner and light commercial loads, and the included grease fittings and adapters make mounting straightforward for many common axles.

Will these wheels fit my mower or garden cart?

Measure your existing tire and hub to confirm fit before purchase. This kit is intended for tires with an overall diameter near 9.29" (commonly called 9x3.50-4), a 3.50" tread width, 4" rim diameter, and a 3/4" bushing/bore size. The centered hub length is 3.5", which matters for axle spacing and spacer requirements.

• Confirm sidewall marking: 9x3.50-4 matches diameter and width.
• Check hub bore: 3/4" bushing size is the standard fitment here.
• Measure hub length and axle clearance to ensure centered alignment.

How do these flat-free PU tires perform compared with air-filled tires?

Polyurethane flat-free tires trade the cushioning of air for consistent, maintenance-free performance. They don’t go flat, resist punctures and tears, and remain stable under load, which reduces downtime and the need for replacements. Expect a firmer ride than pneumatic tires, but better durability and longevity on abrasive surfaces.

• PU compound resists cuts, UV, and oil exposure.
• Non-marking and weather-resistant for lawn and driveway use.
• Maximum load capacity around 300 lb per wheel for common tasks.

What comes in the 4-pack and what accessories aid installation?

The bundle contains four fully assembled PU tires mounted on yellow painted steel wheels, each with a grease fitting for axle lubrication. A universal adapter kit is included to help fit the 3/4" bore to a range of axle sizes, plus nylon spacers and steel washers to fine-tune alignment and prevent rubbing or wobble.

• Four PU tire + steel wheel assemblies with centered hubs.
• Adapter kit: nylon spacers (4 pieces) and steel washers (8 pieces).
• Grease fittings pre-installed for smoother rotation and maintenance.

Are these wheels durable for rough garden and utility work?

Yes — the polyurethane tread is engineered to withstand abrasive terrain and repeated use without puncturing or chunking away. The steel wheel and sealed fitment support loads encountered during lawn care, light hauling, and equipment transport, delivering longer service life than many rubber or pneumatic options in similar conditions.

• PU provides tear and cut resistance on rough surfaces.
• Steel wheel construction maintains structural integrity under load.
• Grease fittings and solid hub reduce wear on axles and bearings.

Who is this for: homeowners and small operators who need a low-maintenance, puncture-free wheel solution for walk-behind lawnmowers, garden carts, wheelbarrows, small trailers, generators, and similar equipment. Choose this AR-PRO kit when you want dependable traction, weather-resistant materials, and a straightforward replacement with adapters to simplify fitting to common axles.