By Paul Kendrick, Cardio & Endurance Editor · Updated 17 July 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 strongest home treadmills of its generation. 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.
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.
Stock check: currently unavailable on Amazon UK
We check availability against Amazon's own catalogue, and as of July 2026 this listing shows as currently unavailable. A brand-wide search still returns plenty of live NordicTrack machines, so this looks like the S20i being discontinued and superseded by the newer T Series and Commercial ranges rather than NordicTrack leaving Amazon. The link on this page still goes to the correct product, but if you want a treadmill you can order today, our best incline treadmill UK guide covers machines that are actually available.
How we review
This review is based on extensive research of verified owner reviews, hands-on testing from trusted expert outlets and NordicTrack's published specifications. We have not run our own months-long endurance test of this exact unit, so we have been careful to report only consistent, repeated findings, both the praise and the complaints, rather than one-off opinions.
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.
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:
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.
| 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 |
The picture from owners and expert testers is consistently positive, and the praise clusters around the same points.
The build quality is the most repeated compliment, along with an iFit subscription that lets you stream any live workout to your own tablet or smartphone, and setup that owners describe as 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 widely reported as 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.
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.
On the evidence, this is a machine most owners stay happy with for years, which makes its disappearance from Amazon UK a genuine shame.
On the research, it rates as one of the stronger home treadmills of its generation. Owners consistently report that it is easy to set up, folds away neatly and runs quietly, and the 12-month iFit membership delivers a genuinely competitive running experience at home without the cost or crowds of a gym. Note that it has since been discontinued and is no longer available on Amazon UK.
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.
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.
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.
An honest MERACH Performance folding treadmill review covering its 3.5HP brushless motor, 18% auto incline, 46cm belt, app and folding design, plus who should buy it.
An honest Bluefin Fitness Kick 5.0 review covering its 10.1-inch screen, 5HP motor, 20 incline levels, Kinomap coaching, shock absorption and who it suits at the price.
An honest NordicTrack Commercial 1750 review covering its 14-inch touchscreen, powerful motor, decline to incline range, iFIT running costs and who should buy it.
An honest Toputure 6-in-1 folding treadmill review: 12% incline, 16km/h top speed, 2.5HP motor, walking-pad mode, app and Bluetooth speaker, plus who it suits and its real limits.
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.