2-Pack 4.10/3.50-4" Heavy Duty Hand Truck Wheels with Solid Flat-Free Tires - 2.25" Offset Hub & 5/8" Bearings - Perfect for Utility Carts, Dollys, and Industrial Equipment

Recently purchased two sets of (flat free tires) from National Standard through Amazon, size 4.10/3.5-4, one for my trailer dolly and another for my hand cart. I received the tires which were exactly what I ordered. The set that went on my trailer dolly were very easy to install, removed the old ones, slid the new ones on and replaced the carter pins. The ones for the hand cart, I had to make two plastic spacers for a proper fit, which was no big problem. I used two 5/8" irrigation hose connectors which I cut for the exact space between the tire rim and frame allowing space for the carter pin to be replaced. No more flat tires for me. Customer Service was outstanding, and I HIGHLY recommend National Standard for your needs!!