The pick for a 40 to 100 hp tractor and a lot of stumps. It cuts deep and wide for under $3,000.
Amazon $2,999The MechMaxx SG30PRO PTO Stump Grinder rates 4.0 among PTO stump grinders; the Digmight 15HP E-Start Stump Grinder rates 4.0 among walk-behind ones. The Digmight 15HP E-Start Stump Grinder costs $1,400 less ($1,599 vs $2,999).

A low-cost way to get key start and a tow bar. Fine for a homeowner whose stumps stand tall rather than run deep.
Amazon $1,599Prices were last checked November 3, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different type classes (PTO and walk-behind), and each is scored against the reference points for its own class, so a rating says how well each does among its own type peers. How we rank explains each factor.
| Factor weight | MechMaxx SG30PRO PTO Stump Grinder | Digmight 15HP E-Start Stump Grinder |
|---|---|---|
| Overall rating | 4.0/5 | 4.0/5 |
| Price 25% | 40 $2,999 | 75 $1,599 |
| Depth 20% | 100 10 in below grade | 60 9 in below grade |
| Height or wheel 10% | 100 30 in cutter wheel | 100 20.5 in above grade |
| Power 10% | 100 tractors up to 100 hp | 96 420 cc engine |
| Teeth 10% | 100 44 teeth | 62 9 teeth |
| Features 15% | 50 slip clutch | 70 electric start, tow bar |
| Warranty 10% | 33 1-year warranty | 33 1-year warranty |
Specifications
| MechMaxx SG30PRO PTO Stump Grinder | Digmight 15HP E-Start Stump Grinder | |
|---|---|---|
| Cutting | ||
| Type | PTO, 3-point hitch | Walk-behind |
| Depth below grade | 10 in | 9 in |
| Height above grade | - | 20.5 in |
| Cutter wheel | 30 in | 12 in |
| Teeth | 44 | 9 |
| Power | ||
| Engine | - | 420cc 4-stroke |
| Displacement | - | 420 cc |
| Engine power | - | 15 hp |
| Electric start | - | Yes |
| Tractor | 40 to 100 hp | - |
| Hitch category | 1 and 2 | - |
| Slip clutch | Yes | - |
| Build | ||
| Tow bar | - | Yes |
| Weight | 641 lb | - |
| Warranty | 1 year | 1 year |