Amazon.com: (2 Sets) 4.00-6 Replacement Pneumatic Tires and Inner Tubes - Universal Fit 13” Tires and Tubes Compatible with Wheelbarrows and Gorilla Carts - With Ribbed Treads and TR13 Straight Valve Stems : Automotive
11 x 4.00-6 With 3.75 Off-Center Hub and 3/4" Cone Roller Bearings
Please see replacement item# 50832. Marathon Tires Cart Assembly, 3/4in. Bore — 13 x 4.00-6 | Northern Tool