solid rubber wheel , heavy load. size 14x4 ,with spoke rim , use for wheel barrow wb6400. axle can be solid . 14x4 solid rubber wheel . material rubber and recycled rubber .use for wb6400 .many different tyre pattern and different rim type for different customers mainly size : 4x2, 5x2, 6x1.5, 6x2, 7x1.5, 8x1.75, 8x2, 10x1.75. 10x2, 13x3, 14x4 etcwelcome e-mail us for much more.