Hayter Wheeled Rotary Mowers. Four wheeled mowers are well suited to lawns where you might have an uneven surface or perhaps some lumps and bumps on the lawn or where you do not require stripes on your lawn. A standard four wheeled mower will offer either rear collect which is when the grass is collected in a bag at the rear of the machine or rear discharge where the grass is dropped behind the mower as it goes along. Petrol lawn mowers are usually the best choice for any gardens other other than very small gardens. They are the preferred option because you do not need to worry about a fixed power source because you can top up the tank with fuel and mow for as long as you need to.