There are a number of mowers that are small enough and sufficiently lightweight to be towed by a quad bike. Most are rotary or flail and take power from an on-board engine.
Broadwood International of Hampshire, Logic of Northumberland and Suffolk-based SCH (Supplies) offer grounds care and estate machinery for use with quad bikes. You need to consider terrain, type and density of vegetation and desired finish. If it is a regularly-mown area, you might want to look at the rotaries from these companies. Rotaries tend to have higher work rates and may have lower maintenance costs.
Broadwood offers the AR Series with working widths of 1.2m, 1.5m and 1.8m. There is a variety of engines and the standard machine comes with side-mounted wheels to allow the mower to follow ground contours. A rear-wheel configuration is available in 1.2m and 1.5m widths if you need to mow close to hedges, fences and borders.
The TRM120 rotary mower/topper from Logic has a 1.2m cutting width and there is the option of a 12.5hp B&S engine or 13hp Honda. The rotary from SCH (Supplies) is a finishing mower, has a 1.5m working width and is powered by an 11.5hp B&S engine. The deck is supported by four castor wheels.
If you are looking to mow rough or infrequently-cut areas, you could consider a flail mower. The AF flails from Broadwood come in 1.2m and 1.6m widths and feature a 5mm steel plate deck, a rear roller and the choice of 13hp Honda or 16hp or 18hp B&S engines. The units from Logic and SCH are 1.2m wide and have 13hp Honda engines.
Sally Drury has reported for HW and its forerunner GC&HTJ for 27 years and has spent more than five years testing machinery for HW and What Kit? The advice in this helpline is independent.