Quick Answer: The Gravely ZT HD (roughly $5,999) is the best zero-turn mower for hilly lawns, combining a low-slung commercial-grade chassis with a wide rear-tire stance that keeps the center of gravity down on slopes up to Gravely’s rated 15-degree limit. Buyers with steeper or more irregular grades should prioritize the Cub Cadet Ultima ZTX4 ($4,299), which offers a factory rollover protective structure (ROPS) option most residential zero-turns skip. Budget-focused buyers on moderate slopes are well-served by the Toro TimeCutter MyRIDE 54 ($3,999), whose rear-suspension system absorbs terrain shock that would otherwise unsettle the mower on uneven grades.
Zero-turns sit higher and narrower than a lawn tractor, and on a slope that difference shows up as real rollover risk — most manufacturers cap their published slope rating around 15 degrees (a 3:1 grade), per Toro and Cub Cadet owner’s manuals. Picking a mower built for hills means weighing center-of-gravity, tire stance, and ROPS availability, not just deck size and horsepower. Here’s how the current lineup compares for sloped lawns.
Zero-turn mowers for hills, compared
| Model | Best for | Slope rating | Stability feature | Price | Rating |
|---|---|---|---|---|---|
| Gravely ZT HD | Best overall | ~15° | Low CG, wide rear stance | ~$5,999 | ★★★★★ |
| Cub Cadet Ultima ZTX4 | Best for steep grades | ~15-20° w/ ROPS | Factory ROPS option | ~$4,299 | ★★★★½ |
| Toro TimeCutter MyRIDE 54 | Best for uneven terrain | ~15° | Rear suspension (MyRIDE) | ~$3,999 | ★★★★☆ |
| Husqvarna Z254F | Best budget option | ~10-12° | Wide 23" rear tires | ~$3,199 | ★★★★☆ |
1. Gravely ZT HD — Best Overall
Gravely ZT HD
- Commercial-grade tubular frame sits lower than most residential zero-turns, which lowers the center of gravity — the single biggest factor in slope stability, per Gravely's own engineering literature.
- Wide rear-tire stance spreads weight further outboard than the entry ZT X series, adding lateral resistance to tipping on cross-slope passes.
- Heavier-duty fabricated deck and Kawasaki or Kohler V-twin options carry the extra weight low in the chassis rather than up high, which also helps stability.
Keeping a hill-rated zero-turn running through mowing season means having spare blades and belts on hand before a slope job strands the mower mid-cut — a free 30-day Amazon Prime trial gets replacement parts to your door in two days instead of waiting on a dealer order. Try Prime free for 30 days.
The ZT HD’s low-CG chassis is the same design philosophy behind Gravely’s commercial ZT X line — see our Gravely zero-turn mower guide for how the full lineup compares.
2. Cub Cadet Ultima ZTX4 — Best for Steep Grades
Cub Cadet Ultima ZTX4
- One of the few residential-tier zero-turns with a factory-available rollover protective structure (ROPS) and seat belt kit, which most competitors reserve for commercial models only.
- Dual hydrostatic transmissions give more precise low-speed control on a slope than a single-lever system, reducing the chance of an uncontrolled slide.
- Fabricated deck and standard rear tires are on par with the Gravely ZT HD, but the ROPS option is the real differentiator for steeper or irregular slopes.
A ROPS adds real weight and cost, so it’s worth it specifically for lawns with slopes near or beyond the typical 15-degree manufacturer rating — on moderate grades the Gravely ZT HD’s low-CG design alone is usually enough. See our Cub Cadet buying guide for how the ZTX4 fits the rest of Cub Cadet’s Ultima lineup.
3. Toro TimeCutter MyRIDE 54 — Best for Uneven Terrain
Toro TimeCutter MyRIDE 54
- Toro's MyRIDE rear suspension isolates the seat from bumps and dips, which matters on hills where uneven ground — not just the slope angle — is what actually unsettles the operator's control.
- Rated to the same roughly 15-degree slope limit as most residential zero-turns, per Toro's owner's manual, so it isn't a hill-specialist chassis like the Gravely ZT HD.
- Lower price than either the ZT HD or ZTX4 makes it the practical pick for lawns with moderate, rolling slopes rather than sustained steep grades.
The MyRIDE suspension is a comfort-and-control feature more than a stability upgrade — see our Toro zero-turn mower guide for how the full TimeCutter lineup compares on flatter ground.
4. Husqvarna Z254F — Best Budget Option
Husqvarna Z254F
- Wider-than-average 23-inch rear tires for its price tier add stability without the cost of a commercial-grade chassis like the ZT HD.
- Rated to a lower slope limit — roughly 10-12 degrees per Husqvarna's published guidance — than the other mowers on this list, so it fits gently rolling lawns better than genuinely steep ones.
- Lowest price of the four, making it the reasonable choice for buyers whose "hilly" lawn is really a handful of moderate grades rather than a sustained slope.
For a genuinely steep lot, size up to the Gravely ZT HD or Cub Cadet ZTX4 rather than pushing the Z254F past its rated slope limit — see our best zero-turn mower guide for how it stacks up outside the hill-specific use case.
How to choose a zero-turn for a sloped lawn
- Center of gravity matters more than horsepower. A heavier engine sitting low in the chassis, like the Gravely ZT HD’s, helps stability far more than raw HP numbers.
- Mow up and down slopes, never across them. Per CPSC and university extension safety guidance, cross-slope mowing — not the slope grade alone — causes most zero-turn rollover incidents.
- 15 degrees is the common ceiling. Toro, Cub Cadet, and Gravely all rate their residential zero-turns to roughly 15 degrees; beyond that, a ROPS-equipped model or a lawn tractor is the safer call.
- Wide rear tires add real lateral stability. The Gravely ZT HD and Husqvarna Z254F both lean on wider-than-stock rear tires as a low-cost stability lever.
- Tire pressure affects hill stability too — see our tire pressure guide for the correct front-to-rear PSI, since mismatched pressure adds drift risk on a slope.
The bottom line
For most hilly residential lots, the Gravely ZT HD is the best zero-turn mower for hills — its low center of gravity and wide rear stance are purpose-built for slope stability up to the common 15-degree rating. Steeper or more irregular grades are better served by the Cub Cadet Ultima ZTX4 and its factory ROPS option, while the Toro TimeCutter MyRIDE 54 fits rolling-but-not-steep terrain and the Husqvarna Z254F covers gentler slopes at the lowest price. For lawns beyond roughly 20 degrees, see our zero-turn vs. lawn tractor guide — a lawn tractor’s stability may be the safer choice regardless of price.