Stump grinding is one of the easiest add-ons to bolt onto a tree care business — it's high-margin, it's almost always priced separately, and homeowners want it done. But buy the wrong grinder and you'll either fight underpowered machines through oak all day or haul a machine too big to fit through a backyard gate. Here's how to match the grinder to the work you actually take on.
Start with two questions: how big, and how tight?
Every stump grinder decision comes down to the tension between power and access. Bigger machines grind faster and deeper; smaller machines fit where the stumps actually are. The right choice is the smallest machine that still handles your typical stump — and a plan for the outliers.
The three types, and who each is for
Walk-behind
The compact workhorse. Walk-behind units — commonly in the low-to-mid horsepower range — fit through a standard 36-inch fence gate, load into a trailer or truck bed, and handle small-to-moderate stumps well. They're the natural first grinder for a crew adding the service, and they reach backyard stumps the bigger machines can't. The trade-off: you're doing more of the muscle work, and they're slower on big hardwood.
Self-propelled
A self-propelled grinder drives itself between cuts while you steer and control depth, which saves your back and speeds up the day. These typically start higher on the power scale and chew through larger stumps far faster — a big stump that takes an hour-plus on a walk-behind can be a fraction of that on a stronger self-propelled machine. They still fit many gates, making them a popular step up for a busy crew.
Towable (tow-behind)
The heavy hitters. Towable grinders are larger, more powerful, and hitch straight to a truck — no separate trailer to load and unload, which saves real time on a route. They're built for big stumps and volume. The catch is access: a big towable can't always get to a stump tucked behind a house, so many pros pair one with a smaller machine for tight yards.
What to weigh before you buy
- Engine power vs. your typical stump. Softwoods and small stumps don't need much; oak, maple, and multi-stump days reward more power. Buy for your bread-and-butter jobs, not the rare monster.
- Access width. Measure the gates you actually work through. A machine that can't reach the stump is worthless no matter how strong it is.
- Cutting wheel and teeth. Carbide teeth and an easy tooth-change design mean less downtime; teeth are a consumable, so factor replacements into cost.
- Transport. Towable saves trailer hassle; walk-behind and many self-propelled units need a trailer or ramp. Match this to your truck and route.
- New vs. used. A well-maintained used grinder from another crew is often a smart first buy — let someone else eat the depreciation.
Buy, rent, or add the service smart
You don't have to own every size. Renting a bigger grinder for the occasional large job — while owning the machine that fits your everyday stumps — is often the most profitable setup. When you're ready, browse stump grinders and other equipment on One Stop Tree Shop, or check the marketplace for machines and parts from other pros. Outgrowing a grinder? List it for sale to buyers who work in the trade. Match the machine to the job, keep it earning, and start with the equipment listings.