The NordicTrack T Series 5 and the Sunny Health & Fitness OneClick-Fold (SF-T723030) are two of the most popular budget treadmills on Amazon, and they’re only about $100 apart. One arrives fully assembled and folds flat. The other doesn’t fold, but it costs less and has a much longer warranty.
As a NASM-certified personal trainer, I compared them round by round, the way I’d help a client choose.
Quick verdict
It comes down to one question: does your treadmill need to fold away?
- Yes → get the Sunny. It arrives fully assembled, folds flat to 11.4″ tall, inclines to 15%, and its app is free. Check price on Amazon
- No → get the NordicTrack T Series 5. It’s about $100 cheaper, with a stronger continuous-rated motor and a 10-year frame warranty. Check price on Amazon
Both are walking and jogging treadmills. If you’ll run hard several times a week, see Planning to run? below.
NordicTrack T Series 5 vs Sunny Treadmill at a glance
| Spec | NordicTrack T Series 5 | Sunny SF-T723030 |
|---|---|---|
| Folds | No (compact, stays set up) | Yes, folds flat |
| Setup | Assembly required | Arrives fully assembled |
| Typical price | About $599 | About $699 |
| Warranty | 10 yr frame, 1 yr motor & parts, 1 yr labor | 3 yr frame, 180 days everything else |
| Motor | 2.6 CHP (continuous) | 2.5 HP peak, brushless |
| Incline | 0–10% | 1.8–15% auto |
| Running deck | 18″ × 55″ | 20″ × 53″ |
| Speed | 0–10 mph | 0.6–10 mph |
| Max user weight | 300 lb | 300 lb |
| Suits runners up to | About 275 lb | About 275 lb |
| Size set up (L × W × H) | 68.3″ × 30.5″ × 48.7″ | 63.8″ × 30.9″ × 44.1″ |
| Size folded | Doesn’t fold | 63.8″ × 30.9″ × 11.4″ |
| App | iFIT Train, $15/month (1 month included) | SunnyFit, free |
| Heart rate | Bluetooth monitor (sold separately) | Built-in grip sensors |
| Built-in programs | 10 | 24 |
| Transport wheels | Yes | Yes |
| Check price | Check Price → | Check Price → |
Specs from NordicTrack’s, Sunny’s, and iFIT’s official pages and the Amazon listings. Prices change often; check today’s prices.
Round by round
Eight rounds, scored honestly. Where the two genuinely match, the round is even.
Round 1: Price (winner: T Series 5)
The T Series 5 typically sells for about $599, and the Sunny for about $699, so the NordicTrack costs about $100 less. Prices on both change often, so check the links for today’s price.
That gap changes if you keep iFIT Train, which costs $15 a month. Over three years, that’s about $540, and the NordicTrack ends up the pricier option (see Round 7).
Round 2: Warranty (winner: T Series 5)
This is the biggest gap between them.
| Warranty | NordicTrack T Series 5 | Sunny SF-T723030 |
|---|---|---|
| Frame | 10 years | 3 years |
| Motor | 1 year | 180 days |
| Parts | 1 year | 180 days |
| Labor | 1 year | Not listed |
Trainer’s take: the motor is the part you least want to replace, and the NordicTrack covers it twice as long. On a treadmill you’ll use most days, that matters more than any feature.
Round 3: Setup, storage and space (winner: Sunny)
This is where the Sunny earns its extra $100.
- Sunny: arrives fully assembled. Raise the handlebar, lock it, and you’re walking; no tools needed. Set up, it measures 63.8″ L × 30.9″ W. Folded, it lies flat at 11.4″ tall, so it can slide behind a couch or under a bed with enough clearance.
- T Series 5: needs assembly and doesn’t fold. It measures 68.3″ L × 30.5″ W × 48.7″ H, full-time. It ships at about 200 lb in the box, so plan on a helper for delivery and assembly.
Both have transport wheels.
Trainer’s test: measure the spot first. If you can’t give up 68.3″ × 30.5″ of floor permanently, the decision is already made: get the Sunny.
Round 4: Running deck (even)
The Sunny’s deck is 20″ wide by 53″ long. The NordicTrack’s is 18″ wide by 55″ long. So the Sunny gives you 2″ more width, and the NordicTrack 2″ more length.
Trainer’s take: extra width makes walking feel less cramped, especially if you drift side to side. Extra length helps when your stride opens up as you speed up. Both are fine for walking and jogging, so this round is even.
Round 5: Incline (winner: Sunny)
Both top out at 10 mph, but the Sunny climbs to 15% incline, and the NordicTrack stops at 10%.
One detail: the Sunny’s incline starts at 1.8%, so it never goes completely flat. You’ll barely notice it while walking. (Amazon lists it as 0–15%, but Sunny’s own page says 1.8–15%.)
Trainer’s take: I use incline walking with a lot of clients. It raises your heart rate without the impact of running, and those extra five percentage points give you more room to progress.
Round 6: Motor (winner: T Series 5)
The numbers look almost the same, but they’re measured differently. The NordicTrack is rated at 2.6 continuous horsepower (CHP), what the motor sustains through a workout. Sunny lists 2.5 HP peak, a brief maximum. For steady daily use, the NordicTrack’s motor is the stronger one.
Sunny says its brushless motor runs quietly. I couldn’t find independent noise tests for this model, so I won’t promise it. Whichever you choose, a treadmill mat underneath cuts vibration and noise, especially if someone lives below you.
Round 7: Apps (winner: Sunny)
Both offer trainer-led workouts, but the experience is different.
| App | iFIT Train (T Series 5) | SunnyFit (Sunny) |
|---|---|---|
| Cost | $15/month, 1 user (1 month included, auto-renews) | Free |
| Workouts | 10,000+ | 1,000+ workouts, 10,000+ scenic routes |
| Controls the treadmill | Yes: the trainer changes speed and incline for you | No: you use the console buttons |
| 3-year cost | About $540 | $0 |
iFIT is clearly the better experience. But most people buying a treadmill at this price want to avoid a monthly bill, and then the Sunny gives you far more for free. That’s why this round goes to the Sunny. If you’ll pay for workouts that run the treadmill for you, the NordicTrack is the better smart treadmill. Without a paid plan, it still runs on its built-in controls, but NordicTrack says a free iFIT account and Wi-Fi are required to operate it.
Round 8: Heart rate and extras (winner: Sunny)
- Heart rate: the Sunny has pulse sensors in the handles. The NordicTrack needs a Bluetooth heart rate monitor (sold separately), and its heart-rate training (ActivePulse) also needs iFIT Train.
- Programs: 24 built-in on the Sunny vs 10 on the NordicTrack.
- Extras: the Sunny adds a USB charging port. Both have a device holder.
Final scoreboard
| Result | Rounds |
|---|---|
| Sunny: 4 | Setup & space, incline, apps, heart rate & extras |
| T Series 5: 3 | Price, warranty, motor |
| Even: 1 | Running deck |
The Sunny wins more rounds, but the NordicTrack’s wins (price, warranty, and motor) matter every day you use it.
The real 3-year cost
| Option | 3-year cost |
|---|---|
| T Series 5, no app | About $599 |
| Sunny + free SunnyFit app | About $699 |
| T Series 5 + iFIT Train ($15/month) | About $1,139 |
Skip iFIT, and the NordicTrack stays about $100 cheaper. Keep it, and the NordicTrack becomes the pricier choice.
Which one is right for you? The 3-question test
Stop at your first yes:
- Does it need to fold away? Get the Sunny.
- Will you pay for workouts that run the treadmill for you? Get the NordicTrack T Series 5.
- Do you want 15% incline, or zero assembly? Get the Sunny.
No to all three? Get the NordicTrack T Series 5. You’ll save about $100 and get a much longer warranty.
Planning to run?
These are walking and jogging treadmills. An easy run now and then is fine; both reach 10 mph. But both decks (53″ and 55″) are shorter than the 60″ I’d want for regular running, and both are rated for 300 lb, so I’d keep runners to about 275 lb.
If you’ll run hard several times a week, stretch your budget to around $1,000 for a 20″ × 60″ deck and a 3.0 CHP motor:
- NordicTrack T Series 10: the natural step up from the T Series 5, with 0–12 mph and 0–12% incline. 325 lb max (runners up to about 300 lb). Check price on Amazon
- Horizon 7.0 AT: my best overall pick in my Best Treadmill on Amazon roundup, with no subscription required. 325 lb max (runners up to about 300 lb). Check price on Amazon
Before you buy
- Measure your space. The T Series 5 needs 68.3″ × 30.5″ of floor full-time. The Sunny needs 63.8″ × 30.9″ set up, and folds flat to 11.4″ tall. Leave some clearance behind and beside either one.
- Delivery and setup. The Sunny arrives fully assembled. The T Series 5 needs assembly and ships at about 200 lb in the box, so have a helper ready.
- iFIT trial. The T Series 5 includes one month of iFIT Train, which auto-renews. Set a reminder to cancel if you don’t plan to keep it. Either way, you’ll need a free iFIT account and Wi-Fi to run it.
- Floor and noise. Put a treadmill mat underneath to protect the floor and cut vibration, especially in an apartment.
Frequently asked questions
Is the Sunny worth $100 more than the NordicTrack T Series 5?
If you need a treadmill that folds away, arrives assembled, or inclines to 15%, yes. If it can stay set up in one spot, no: the T Series 5 costs less, has a stronger continuous-rated motor, and its frame is covered for 10 years instead of three.
Can you run on the NordicTrack T Series 5 or the Sunny?
Yes, for easy runs. Both reach 10 mph and handle walking, incline walking, and jogging well. Their decks (53″ and 55″) are shorter than the 60″ I’d want for frequent fast running, so regular runners should look at a 20″ × 60″ model like the Horizon 7.0 AT or NordicTrack T Series 10.
Do I need an iFIT membership for the T Series 5?
You don’t have to keep a paid membership, but NordicTrack says a free iFIT account and Wi-Fi are required to operate the treadmill. iFIT Train ($15/month, one user) adds 10,000+ workouts that automatically change your speed and incline, plus SmartAdjust and heart-rate training. One month is included and auto-renews, so cancel in time if you don’t want it.
Does the SunnyFit app control the treadmill?
Sunny doesn’t say it does. The free app offers 1,000+ workouts and 10,000+ scenic routes and tracks your stats, but you change speed and incline with the console buttons.
What’s the weight limit?
Both are rated for 300 lb. For running, I’d keep users to about 275 lb to leave some headroom.
Which has the better warranty, the NordicTrack T Series 5 or the Sunny?
The NordicTrack T Series 5, by a wide margin: 10 years on the frame and one year on the motor, parts, and labor. The Sunny covers the frame for three years and everything else, including the motor, for 180 days.
Which is quieter?
Sunny says its brushless motor runs quietly, but I couldn’t find independent noise tests for this Sunny model yet. A treadmill mat underneath helps either one, especially in an apartment.
Final verdict
Get the Sunny OneClick-Fold if your treadmill needs to fold away, or you want it ready to use out of the box. Get the NordicTrack T Series 5 if it can stay set up: it’s about $100 cheaper, with a stronger motor and a far better warranty.
Still not sure? Leave a comment with how much space you have and how you’ll use it, and I’ll tell you which one I’d pick.
How this comparison was made
This comparison is based on NordicTrack’s, Sunny’s, and iFIT’s official specifications and warranty terms, the Amazon listings, and my experience as a NASM-certified personal trainer and Precision Nutrition Level 1 coach. Specs were checked on October 13, 2026. For more options at every budget, see my Best Treadmill on Amazon roundup.
