GICOOL Solid 3.50-8 Wheelbarrow Wheel 14.5" Flat-Free PU Tire with 5/8" Axle & Sealed Bearings

GICOOL 3.50-8 is a flat-free, solid PU-foam wheel and one-piece welded rim designed to replace common wheelbarrow, trolley, dolly, and small-vehicle tires without inner tubes.

If you need a reliable replacement wheel that resists punctures, supports heavy loads, and fits a variety of small utility carts, this GICOOL solid tire is built to be maintenance-free. It combines a dense polyurethane foam tread with a robust steel rim, sealed bearings, and an adapter kit so you can tailor the hub fit to your axle and equipment. The tire’s measured dimensions make it compatible with several popular nominal tire sizes used on wheelbarrows, hand trucks, go-karts, and garden trolleys.

Will this wheel fit my wheelbarrow, trolley, or dolly?

Measure your existing wheel’s diameter, tread width, axle bore, and hub length. The GICOOL wheel has a 14.5" outer diameter, 3.2" tread width, 5/8" axle bore, and a centered hub length of 3", matching many common 3.50-8 and similar replacements.

• Outer diameter: 14.5 inches (fits many 3.50-8 references)
• Tread width: 3.2 inches for stable contact patch
• Axle bore: 5/8 inch (0.625") standard axle size
• Centered hub length: 3 inches for common hub depths

How does the flat-free construction impact performance?

The tire’s solid polyurethane foam core eliminates tubes and the risk of punctures while keeping stiffness that supports load-bearing tasks. PU foam offers wear resistance and tear resistance so the wheel maintains shape and traction during repeated use.

• Airless design: no inflation, no flats, no inner tube
• Durable PU foam: resists abrasion and tears over uneven terrain
• Consistent ride height and handling under load

What makes the rim and bearings suitable for heavy work?

The wheel uses a one-piece welded carbon-steel rim engineered to resist bending and separation under load. Double-sealed bearings are installed to enable smooth rotation and keep out dust and moisture for longer service life.

• One-piece welded rim: improved structural integrity under heavy loads
• Double-sealed carbon-steel bearings: smoother spin and longer durability
• Balanced hub design to reduce wobble during transport

Does it include parts to adapt to different hub sizes?

Yes — the wheel arrives with an adapter kit so you can fit it to varying hub widths and axle clearances without buying extra parts. The small set of bearings and nylon spacers lets you adjust the wheel alignment and spacing quickly.

• Included: two 3/4-inch bearings for secure bearing seats
• Two nylon spacers (0.5" and 1.5") to adjust hub clearance
• Adapters allow use on slightly different hub depths and axle offsets

Who this is for: This GICOOL wheel is aimed at homeowners, landscapers, small-scale farmers, and hobbyists who use wheelbarrows, hand trucks, garden trolleys, or small go-karts and want a maintenance-free, puncture-resistant replacement. It’s a practical choice when you need a durable, ready-to-install wheel that eliminates tube problems while offering solid load support and easy adaptability to common axle setups.