Wheelbarrows are essential to gardeners and landscapers because they permit users to move heavy loads manually with relatively little effort. They can carry everything from bricks to potting soil or cement--that is, assuming the wheel on the wheelbarrow is in proper order. If the wheel is damaged, you'll need to replace it. One option for doing this is to use a tubeless universal wheelbarrow tire. These will work on any wheelbarrow and don't have tubes that can deflate.
Turn the wheelbarrow over and set it on a flat surface so the tire is exposed.
Loosen the tire brackets with pliers, a screwdriver or a wrench. The tire brackets hold the axle and tire to the front braces using screws, nuts and other hardware, depending on the wheelbarrow design and model. Set the screws, washers or bolts aside.
Slide the axle out of the old tire and front brace axle holes.
Measure your hub. The hub is the distance between the two front braces through the axle holes.
Look at the bushing chart that came with your universal wheelbarrow wheel. A bushing is basically a plastic or metal spacer that fits into a hole and limits the size of the opening. The chart will tell you if you need to attach bushings to the braces for the wheelbarrow to sit properly in the hub.
Slide a screwdriver under any old bushings on the front frames, and tap gently to remove them if necessary. Fit any new bushings onto the front frames and secure them with the hammer. Depending on the hub measurement, you may be able to skip this step.
Scrub down the wheel axle to remove any built-up dirt and grime that could keep the axle from working properly. Dry the axle. Coat the axle very lightly with oil to prevent rusting.
Fit the new wheel between the front braces so the hole in the tire lines up with the axle holes in the braces.
Slide the axle through the axle holes in the front braces and the hole in the wheel.
Put the washers, screws, nuts and bolts back into position. Tighten them to secure the axle and wheel.