Best Incline Treadmill 2026: Incline Trainers Tested & Ranked

Quick Answer: The best incline treadmill in 2026 is the NordicTrack X24 (~$2,999) — its -6% to 40% incline range is the steepest of any home treadmill, backed by a 4.25 CHP motor, 12 mph top speed, and a 24-inch iFIT touchscreen that auto-adjusts the grade during trainer-led climbs. The NordicTrack X16 (~$2,499) delivers the same 40% climb with a smaller screen for less, the Bowflex Treadmill 22 (~$2,799) has the highest incline of any folding treadmill at -5% to 20%, and on a budget the Horizon 7.0 AT (~$999 on sale) still climbs to a full 15%.

Last updated July 8, 2026 — pricing and incline specs verified across NordicTrack, Bowflex, Sole, and Horizon’s current 2026 lineups.

Incline is the most underrated dial on a treadmill. Crank the grade and walking at 3 mph becomes a workout that rivals running for calorie burn — without the pounding on your knees. That’s why the 12-3-30 workout went viral, why hikers and ultra runners train on incline trainers all winter, and why the incline spec deserves more attention than the touchscreen when you’re comparing machines. But incline ranges vary wildly: a standard treadmill tops out at 12–15%, while a dedicated incline trainer climbs to a 40% grade — steeper than almost any trail you’ll ever hike. We ranked the best incline treadmills of 2026 across both categories, from true 40% incline trainers to budget machines that still climb hard.

By the numbers: The NordicTrack X24 and X16 climb to a 40% incline and drop to a -6% decline — per NordicTrack, the steepest range on any home treadmill, and reviewers at TreadmillReviews.net confirm nothing else on the market matches it at the price. The Bowflex Treadmill 22’s -5% to 20% range is the highest we’ve seen on a folding treadmill, per BarBend’s testing. And according to Harvard Health Publishing, a 155-pound person burns roughly 600 calories per hour running at 6 mph on the flat — steep incline walking approaches that burn at a fraction of the joint stress, which is the whole case for buying incline in the first place.

Our top picks at a glance

1. NordicTrack X24 — Best Overall

The X24 is the current king of the category — the machine every other incline treadmill gets measured against. The 40% maximum grade sounds like a gimmick until you try it: at 40%, walking at 2 mph torches your glutes and calves and drives your heart rate into zones you’d normally need a hard run to reach, all with walking-level impact. The -6% decline matters just as much for trail and ultra runners, because downhill eccentric loading is what destroys unprepared quads on race day. Around it, NordicTrack wrapped its best hardware: a 4.25 CHP motor that shrugs off daily running, a 24-inch screen, and iFIT integration that auto-drives the grade during trainer-led hikes through real terrain. It’s big, heavy, and not cheap — but if incline is the reason you’re buying, this is the ceiling. It pairs naturally with a weighted vest for ruck-style training, and our best treadmill guide covers the flat-land alternatives.

2. NordicTrack X16 — Best Value Incline Trainer

Here’s the quiet truth about the X-series: the X16 climbs exactly as high, drops exactly as low, and runs on exactly the same 4.25 CHP motor as the X24. What you give up is screen real estate — 16 inches versus 24 — and some console polish. What you keep is every part of the machine that actually trains you: the full -6% to 40% range, the 12 mph top end, the 22-by-60-inch belt with SpringFlex cushioning. If the X24’s price stings, this is the value play in the entire incline-trainer category, and it’s frequently discounted below its list price at big-box retailers. Most buyers watching their budget should start here and put the savings toward home gym flooring to protect the floor under a 300-pound machine.

3. Bowflex Treadmill 22 — Highest Incline on a Folding Treadmill

The X-series trainers don’t fold — and for a lot of home gyms, that’s the dealbreaker. The Bowflex Treadmill 22 is the answer: a -5% to 20% range that beats every other folding treadmill we’ve seen, on a tank of a frame rated to 400 pounds that still lifts up to reclaim floor space. Twenty percent is a serious grade — double what most standard treadmills offer — and the -5% decline gives downhill simulation the Sole and Horizon machines in this price range can’t fully match. The 3.5 CHP motor gives up a little top-end to the NordicTrack machines and the JRNY subscription is less compelling than iFIT, but as the “maximum incline that folds away” pick, it owns its lane. Space-constrained buyers should also see our best foldable treadmill guide for lighter options.

4. NordicTrack Commercial 1750 — Best All-Round Folding Treadmill with Decline

The 1750 is our overall pick in the best treadmill guide, and it earns a spot here because it’s the best balanced machine that still takes incline seriously. The current model runs -3% decline to 12% incline — enough to cover the 12-3-30 crowd, rolling-hills programs, and downhill prep — while being a better pure running treadmill than anything above it on this list, with a 4.25 CHP motor, generous RunFlex cushioning, and a deck built for daily miles. If you’d describe yourself as a runner who wants incline rather than a climber who sometimes runs, buy this and never look back; it’s also the machine most often found deeply discounted during NordicTrack’s frequent sales. Compare it against Sole’s lineup in our NordicTrack vs Sole head-to-head.

5. Sole F85 — Best Without a Subscription

Every NordicTrack and Bowflex on this list works best with a paid subscription driving the screen. The Sole F85 is the incline pick for people who refuse to rent their treadmill’s brain: every feature — the full -6% to 15% range, the training programs, the Netflix and YouTube apps on the 15.6-inch screen — works out of the box with no membership, ever. The -6% decline is genuinely rare at this price and deeper than the 1750’s, the 4.0 CHP motor is built for daily running, and Sole backs the frame, motor, and deck for life. It won’t climb like an X-series trainer, but as a subscription-free machine that still trains hills in both directions, it’s the one we’d put in most garages. See how Sole’s philosophy stacks up against iFIT machines in NordicTrack vs Sole.

6. Horizon 7.0 AT — Best Budget Incline Treadmill

Under $1,000, most treadmills give you 10–12% incline on a motor that groans about it. The Horizon 7.0 AT is the exception: a true 15% maximum grade, a 3.0 CHP motor that holds up to actual running, and Horizon’s QuickDial rollers that let you sweep the incline up and down mid-interval — a small feature that makes hill-interval workouts dramatically less annoying. There’s no decline, no giant touchscreen, and no ecosystem, which is exactly why it’s cheap and why it has nothing to break or subscribe to. For 12-3-30 devotees, incline-walking beginners, and anyone testing whether hill training sticks before spending $2,500+, this is the smart entry point. It’s also our budget pick in the best treadmill guide.

How to choose an incline treadmill

• Decide: incline trainer or incline-capable treadmill. If hiking, trail, ruck, or ultra prep is the goal, a 40% X-series trainer (X24/X16) is a different tool than any 15% machine. For 12-3-30 and general hill work, 12–15% is plenty.
• Don't ignore decline. -3% to -6% trains the downhill eccentric loading that flat training never touches — the difference between quads that survive a hilly race and quads that don't.
• Match the motor to the grade. Sustained climbing under body weight is hard on a motor. Look for 3.0 CHP minimum at 15%, and note the serious climbers (X24, X16, 1750) all run 4.25 CHP.
• Check ceiling height. A steep incline raises your head height dramatically — on a 40% trainer, taller runners want roughly 9-foot ceilings. Measure before you order a 300-pound machine.
• Budget for the subscription — or opt out. iFIT's auto-incline trainer-led climbs are genuinely the best software experience on steep grades, but they're a recurring cost. Sole and Horizon give you the full incline range with zero subscription.

Is an incline treadmill worth it?

If a treadmill is going to live in your home, incline range is the spec that most changes what the machine can do for you. The math is simple: per Harvard Health Publishing, running at 6 mph burns about 600 calories per hour for a 155-pound person — and steep incline walking approaches that burn while your joints experience little more than walking-level impact. That’s the entire reason the 12-3-30 protocol works, why physical therapists reach for incline walking with injured runners, and why hikers put 40% trainers in their garages. A flat-only or 10%-max machine locks you out of all of it. Whether that means a $999 Horizon at 15% or a $2,999 X24 at 40% depends on your goals and space — but between two otherwise similar treadmills, buy the one that climbs higher.

Building out a full cardio corner? See our best cardio machine overview for how treadmills compare against rowers and bikes, the best walking pad guide if you need something that slides under a desk, and the best home gym equipment pillar for the complete setup.