Do you have a thick weeded area to trim? One that's seemingly too large for a handheld string trimmer, but too thick or rough for a lawn mower?
Wheeled string trimmers, also called walk-behind string trimmers, are rugged string trimmer heads attached to a walk-behind frame with two large wheels for maneuvering over rough terrain.
The string trimmer line covers a much wider area than it does on a hand-held string trimmer. Overgrown lots and thick fields of weeds are no match for a wheeled string trimmer.
There are several reasons wheeled wheeled string trimmers are a good choice for rough terrain and thick brush.
Wheels on walk-behind string trimmers are large (12 - 16"), which makes them more maneuverable on uneven surfaces. The wheels are made of hardened plastic or a Never Flat material so you won't get a flat tire if you're rolling it through an overgrown field that's littered with broken bottles and wind-blown trash (consider using a litter vacuum when you're done).
Cutting Width of wheeled string trimmers is 22" so you can cut a lot at once. Push this trimmer into a patch of weeds and you'll be done in no time.
All wheeled string trimmers are powered by similar engines. They have 4-cycle engines (like a lawn mower), which require oil changes and other simple maintenance to keep them running smoothly.
Another common feature on all wheeled trimmer engines is a recoil starter. Like a lawn mower, recoil start requires you to pull a starter rope to turn the engine over and get it going.
Because these trimmers are capable of tackling tough brush, you may find the trimmer line breaks more often.
Your best bet is to have some replacement line on hand. Line comes in a variety of diameters and lengths, but you should use the diameter recommended for your trimmer by the manufacturer for the best results.