Replacement "Balloon/Beach" tires. Sold in sets of two. Fits Malone MPG521-S, MPG522-S, MPG564-S and MPG576-S carts.
Beach wheels italia
Beach Wheels For Heavy Duty Kayak Kart | Wilderness Systems Kayaks | USA & Canada
Amazon.com: Bonnlo 16" D X 8" W Balloon Wheels for Axle with 0.78-in Diameter Axle Hole 20mm Beach Sand Tires with Bearings for Homemade Beach Wagon Kayak Trolley Fishing Cart, 2 Pack :
Wheeleez™ - Superior Quality Wheels and Beach Wheelchairs
VEVOR Beach Balloon Wheels, 13" Replacement Sand Tires with 32" Stainless Steel Axle, TPU Cart Tires for Kayak Dolly, Canoe Cart and Buggy w/ Free Air Pump, 2-Pack - Walmart.com
VEVOR Beach Balloon Wheels 13 "pneumatici di ricambio per sabbia pneumatici per carrello in TPU per Kayak Dolly canoa e Buggy con pompa ad aria libera confezione da 2 _ - AliExpress Mobile