While they don’t break very often, lawn mower wheels should be immediately replaced if they happen to fail. The wheels of a lawn mower are a part that you wouldn’t think needs maintenance, but they can break over years of use or 
neglect. These wheels are specially designed to be used with lawnmowers and have special tread which allows them to roll over grass easily. The easiest way to replace a wheel is to search for the exact manufacturer’s part. Companies like Toro and Black & Decker help their customers find the exact part they need. If the part is unavailable, there are generic replacements which work just fine. The key is to match the size, axle diameter and wheel type to your mower.
Self Propelled , Pushed, and Push-Reel
Lawn mower wheels come in three types. The first is designed for self-propelled lawnmowers. In case you are not aware, self-propelled mowers use power from their engine to push the mower along. Users simply control the throttle and change the direction of the mower using the handle. Wheels for these types of lawn mowers are distinct in that they have ridges on the inside of the lawn mower wheel. These ridges interlock with the drive gear to turn the wheels. You may need a replacement wheel if you notice that your mower is turning in one direction, lurching or not moving at all. Check the ridges to look for wear. If wear is present, it is time to replace both drive wheels. Replacing both wheels is advised for uniformity power to each wheel.
Push mowers lack a drive system so you won’t see any ridges on these ones. They are also easier to replace than self-propelled wheels. By loosening a bolt on the end, the wheel should come off easily. Replacement may be more intensive on models with one-touch height adjustment.
Push reel mowers don’t use a motor but instead use human power to turn a spiral blade. If a wheel break on a push-reel mower it can be quite easy to replace. Be sure to match the wheel diameter to ensure that the blades reach the ground.
Lawn Mower Tire Tread
Tire tread is simply the textured rubber exterior on the tire. The rubber has tread so it can grip the ground firmly even on rough terrain. This is important on all types of lawnmowers. When replacing the wheels, users can pick between different tread types for best results. Such treads include diamond and zig-zag.
Plain Rubber and Pneumatic
For most lawn mowers, a basic rubber tire works just fine. Larger mowers might benefit more from pneumatic tires. Pneumatic lawn mower tires are filled with pressurized air just like the ones on your car or bicycle.
