Treadmills
Sportstech F37 Review: A Big-Surface Folding Treadmill
An honest Sportstech F37 treadmill review covering its 20 km/h motor, 15% incline, large cushioned deck, folding design, app and the real downsides, plus who should buy it.
Treadmills4.5
NordicTrack S20i Treadmill Review: Worth It in 2026?
By Paul Kendrick, Cardio & Endurance Editor · Updated 26 June 2026
We may earn a commission from qualifying purchases made through links on this page, at no extra cost to you. This never affects our ratings.
Looking for a new home treadmill? The NordicTrack S20i is one of the best home treadmills we've tested. It's a gym-grade machine with up to 10% incline, an 18 km/h top speed and a 12-month iFit membership thrown in. We've put it through its paces over several months to bring you this honest review.
NordicTrack has been making treadmills for over 40 years, so they know what they're doing. Two features make the S20i stand out from its rivals: an incline of up to 10% (most home treadmills cap out at 5%) and a build quality that's hard to match at this price.
Pros
- Up to 10% powered incline, double most home treadmills
- 12-month iFit membership included for live and on-demand workouts
- Excellent build quality and a cushioned, joint-friendly deck
- SpaceSaver folding design with EasyLift Assist for easy storage
- Large 51 x 140 cm running surface and 18 km/h top speed
- Strong warranty: lifetime frame, 10-year motor
Cons
- Heavy at 95 kg, so you'll want help during setup
- Best features rely on an ongoing iFit subscription
- Large footprint when unfolded
The S20i also comes with a 12-month iFit membership, letting you stream live and on-demand workouts led by elite personal trainers directly to your own tablet or smartphone. But does it deliver in daily use? Read on before you buy.
NordicTrack S20i features
The S20i is packed with professional, gym-level features that should be more than enough to keep you motivated through every workout. Here are the biggest highlights:
- 5" LCD display: Track your speed, estimated calorie burn and more on an easy-to-read screen. Pair it with the iFit app for enhanced metrics across all iFit-compatible equipment.
- SMART-Response motor: This drive system uses self-cooling technology, so it's far less likely to overheat than a traditional treadmill motor.
- Folding SpaceSaver design: Fold the deck up and out of the way after each workout. An EasyLift Assist shock locks it in place for safe storage.
- 0-10% incline and 0-18 km/h speed: Digital Quick Incline and QuickSpeed controls let your iFit trainer auto-adjust speed and incline to match real-world terrain.
The S20i is a great way to improve your health and get in shape at your own pace. Its up-to-10% incline (versus the usual 5%) makes it ideal for toning your legs and strengthening your calves, and the pre-programmed workouts mean you can be up and running in no time.
Full specifications
| Drive system | 2.5 CHP DurX Commercial Plus motor |
|---|---|
| Rollers | 1.9" precision-balanced |
| Incline | 0-10% Digital Quick Incline Control |
| Top speed | 18 km/h Digital QuickSpeed Control |
| Tread belt | 51 x 140 cm, cushioned deck |
| Display | 5" LCD, Bluetooth (iFit enabled) |
| Extras | Integrated tablet holder, dual speakers |
| User capacity | 135 kg |
| Product weight | 95 kg |
| Dimensions (L x W x H) | 203 x 91 x 151 cm |
| Folded (L x W x H) | 101 x 91 x 172 cm |
| Max incline height | 35 cm |
How the NordicTrack S20i performs
We've been fortunate enough to live with the S20i for a few months now, and we've really tried to push it to its limits.
Overall, we're extremely pleased with it and would happily recommend it to anyone after a new home treadmill. The build quality is excellent, the included iFit subscription lets you stream any live workout to your own tablet or smartphone, and setup is genuinely easy. You can even map out your own runs using Google Maps. After a workout, it folds away for tidy storage.
On the downside, the S20i is on the heavy side at 95 kg, which some buyers may find off-putting. Make sure you have a friend or family member on hand for setup. The instructions are clear and easy to follow, so you shouldn't run into any trouble.
Make the most of iFit
Your 12-month iFit membership is worth around £175 and unlocks live, studio and global workouts where the trainer adjusts your speed and incline automatically. Use a separate tablet or phone on the integrated holder to get the full interactive experience.
Warranty
The S20i is backed by a reassuring warranty: a lifetime frame warranty, a 10-year motor warranty, and 2 years of parts and labour, provided you register your warranty within 28 days of purchase.
We give this machine our highest recommendation and believe anyone who buys it will be happy with it for years to come.
Frequently asked questions
Is the NordicTrack S20i treadmill worth it?
Yes. After several months of testing we rate it as one of the best home treadmills we've used. It's easy to set up, folds away neatly, runs quietly, and the 12-month iFit membership delivers a genuinely competitive running experience at home without the cost or crowds of a gym.
Is the NordicTrack S20i good for home use?
It's an excellent home choice. The SpaceSaver folding design, large 51 x 140 cm running surface, cushioned deck and high 18 km/h top speed suit everyone from walkers to regular runners. Just note its 95 kg weight makes initial setup a two-person job.
How much does a NordicTrack treadmill cost?
NordicTrack treadmills typically range from around £700 to £2,000+ depending on the model. Higher-priced machines lean towards commercial gym use, while lower-cost models are aimed at home users.
Do NordicTrack treadmills need maintenance?
Yes, a moderate amount. Wipe the deck and console with mild soap and water monthly, use a household cleaner on stubborn marks (never paint thinner), and check that all screws and bolts are tight at least once a month, tightening any that have worked loose.
Related guides
Treadmills
4 Ways a Treadmill Can Improve Your Fitness Level
Discover 4 ways a treadmill can improve your fitness level. Build leg muscle, burn calories, train rain or shine, and personalise every workout at home.
Treadmills
6 Treadmill Mistakes Beginners Make (And How to Avoid Them)
Just starting out on a treadmill? Avoid these 6 common beginner mistakes, from going too fast to skipping water, for safer, more confident workouts.
Treadmills
Are Treadmills Good for Losing Weight? An Honest Guide
Are treadmills good for losing weight? Yes. Used with a calorie deficit they burn fat, tone your body and help you lose belly fat. Here's how to do it right.
Best Exercise is a participant in the Amazon EU Associates Programme, an affiliate advertising programme designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.co.uk. As an Amazon Associate we earn from qualifying purchases. This comes at no extra cost to you and never influences our independent reviews or rankings.