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NordicTrack X15i Incline Trainer Review

Quick Summary

As the top-of-the-line NordicTrack Incline Trainer, the iFit-enabled X15i shows off the brand’s best components and features.

Highlights include a power ramp with -6% to +40% range, a 15″ high definition TV and a touch screen with web browser. For heavy duty training and low maintenance ownership the X15i also gets a 4.5 CHP motor and a high quality two-ply track.

Learn more from our NordicTrack incline trainer review including pros and cons of choosing the X15i.


Model NordicTrack X11i Incline Trainer

Our custom rating considers all of the treadmill's features, specs, warranties, and 100's of user & expert reviews, to save you time!

List Price

Suggested retail price, typically higher than the price you'll pay with our recommended retailers.

Best Price

Since prices change daily, this link goes to our preferred retailer for the current best price. Note: MSRP stands for Manufacturer's Suggested Retail Price.


Treadmill Speed is measured in Miles Per Hour (mph). Average running speed is 5-9 mph.

0 - 12 mph

Treadmill Incline measures the angle of the deck, and how steep it is relative to the floor (0% is flat, and 15% is like a steep hill).

-6 - 40%

The Treadmill Motor is what turns the belt as you run. We recommend at least 2 HP (Horsepower) motors, 2.5+ HP for jogging, and 3.0+ HP for running.

4.5 CHP

Treadmill Deck dimensions are measured in inches: Width x Length. The wider and longer the deck, the safer it is (55-60 inches long recommended for running).

22" x 60"

The Treadmill Belt is the surface you run on. The thicker the belt, the less impact on your joints. At least 2-ply (1 inch) recommended.

Reflex Cushioning

Some treadmills are designed to conserve space by folding up. This is a convenient option, but some features might be reduced.


Treadmill Programs allow you to complete a workout with changing speeds and inclines, without changing anything manually.

Max. Weight

Treadmill Max User Weight is the amount of weight, in pounds (lbs), that it can safely support, which can represent durability.

350 lbs
Heart Rate

Heart Rate programs allow you to track how many times your heart is beating per minute (bpm), and some control the workout for you.

Wireless Chest Strap

Dimensions are included to help you figure out if this treadmill will fit properly (Length x Width x Height and Height x Depth).

70.2" x 39.6" x 69.7"

Treadmill Display refers to the screen you'll look at to monitor workouts. LED and LCD displays are similar to TV screens.

10" Web-Enabled Touchscreen
Cooling Fans

Treadmill Cooling Fans are designed to help keep you cool during an intense workout.

Accessory Tray

Some treadmills include an accessory tray for holding items such as water bottles, wallets, keys, or MP3 players like iPods.


Treadmills that include a sound system allow you to listen to your MP3 player/iPod through built-in speakers (no headphones).

Quick Controls

Quick Controls allow you to select speed, incline and even workout programs with the touch of a button (usually on the handles).


The warranty is a very important part of your investment. The longer the warranty, the longer you can get free/discounted repairs by the manufacturer.

Frame: Lifetime
Motor: Lifetime
Deck: Lifetime
Parts: 6 Years
Electronics: 6 Years
Labor: 3 Years

Rating: 91.0%

Our Rating

Rating: 91.0/100. The X15i is NordicTrack’s premier incline trainer. It has the same impressive specs as the bestselling X11i except it’s enriched with a 15” HDTV and has a slightly more powerful motor.

Key specs include: a 4.5 CHP drive; an incline range of -6 percent to 40 percent; and a 10” touch screen for accessing preset workouts, iFit and the web.

The newest X15i model also features WhisperQuiet™ technology and an adjustable-angle tablet holder. Its sale price of $2,999 might be a drawback but the X15i carries an excellent warranty including six years on parts and three for labor.


  • Long and extra-wide track (60″ L x 22″ W)
  • Dramatic range of power incline/decline (-6 percent to 40 percent)
  • Allows rapid calorie burn
  • Lower impact than traditional treadmills
  • Powerful motor
  • Two-ply track for longevity and low maintenance
  • WhisperQuiet™ deck absorbs sound from each step
  • Music friendly (iPod-compatible, 3” speakers)
  • 44 preset workout apps
  • iFit-enabled for unlimited workout variety and advanced data management
  • 10″ full-color touch screen with Android browser
  • Adjustable tablet holder
  • Easily assembled
  • Excellent warranty package


  • Costs more than a traditional treadmill with comparable horsepower
  • NordicTrack customer service often gets disappointing reviews


Drop weight while watching HDTV! The durable NordicTrack X15i Incline Trainer leads an impressive collection of powerful treadmill alternatives.

Incline training is an ideal way to rev up your metabolism and the X15i offers a dramatic 40% maximum slope. It also has a max 6% decline to help you improve balance and develop exceptional muscle tone.

Equipped with everything from iPod-compatible speakers to a 15” television, this fitness machine is a top contender for shoppers with comfortable budgets. The X15i Incline Trainer has a $2,999 sale price and carries NordicTrack’s best warranty.

Designed to fit almost anyone’s physical requirements, the X15i has the force to power heavy workouts — its motor has 4.5 continuous horsepower — and provides a spacious 22″ x 60″ surface for walking or running.

This trainer has a 350-pound user weight capacity.

Workout Programs

NordicTrack fitness machines take the guesswork out of training. The X15i’s 44 built-in programs were designed by a certified personal trainer to help users focus on calorie burn, heart rate control, incline training and speed training. Each workout program can adjust the machine’s speed (maximum 12 mph) and angle its track between -6% and 40%.

For literally infinite workout variety the NordicTrack X15i is iFit-enabled too. With a monthly or yearly iFit membership you can access an extensive online selection of video workouts, download a customized workout whenever you’d like, or use the interactive Google Maps™ feature. iFit’s Google Maps™ integration lets you specify any real-life route and virtually experience its terrain: The incline trainer will adjust its incline to simulate the rise and fall of the actual landscape, and a Google Street View will be displayed for a visually immersive workout experience.

For its heart rate control workouts and general guidance, the X15i gives two options for heart rate monitoring. It has CardioGrip™ pulse sensors on its handlebars and arrives with a chest strap for wireless data transmission.

Incline Trainer Features

The X15i has NordicTrack’s top components for durability (i.e., a two-ply tread track, large track rollers and their top motor). It’s also equipped with the brand’s best features for workout support and entertainment.

For performance its distinguishing feature is the dramatic 40% incline. Use the incline to focus on specific muscle groups and burn calories at up to five times your usual rate! For added muscle toning a 6% max decline is provided too. You can make the most of the incline/decline with Google Maps™ workouts, which are available with an iFit membership.

For entertainment the 15″ HDTV is key. This feature isn’t available on any other NordicTrack incline trainer for 2016.

Other perks for digital entertainment are an iPod-compatible port and 3″ speakers, a 10” touch screen with Android browser, and a bracket for your tablet computer. The bracket has an adjustable angle to help people of different heights get a good view.

To promote endurance two AutoBreeze workout fans are built into the console. AutoBreeze fans can automatically adjust their speed to suit your workout intensity. If you’d rather set the speed though, that’s an option too.

Finally, OneTouch controls make adjustments easy. You can change the X15i’s speed and incline without scrolling through menus.

Warranty & Guarantee

The NordicTrack X15i Incline Trainer has the brand’s best warranty:

– Frame: Lifetime
– Deck: Lifetime
– Motor: Lifetime
– Parts & Electronics: 6 Years
– Labor: 3 years

NordicTrack also provides a 30-day money back guarantee.


In our review the NordicTrack X15i Incline Trainer is a top treadmill alternative in its price category. It delivers rapid results, is built with durable components and offers more motivation than you’ll find anywhere else. If it fits your budget, go for it! If you’d be wise to cut costs though, then forego the HDTV and opt for the very similar X11i instead. Both of these top incline trainers are crowd pleasers.

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