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Sunny Health & Fitness ASUNA Space Saving Treadmill

4.4 out of 5 stars 813 ratings
Amazon's Choice highlights highly rated, well-priced products available to ship immediately.
Amazon's Choice in Treadmills by Sunny Health & Fitness

Price: $699.97

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  • EASY-TO-USE DISPLAY: Watch your workout progress in real-time with the 4-window display. View your time, distance, speed, and calories burned all at the same time. Use the integrated pedometer to track your steps during each exercise session.
  • EXTREMELY PORTABLE: This running treadmill can be easily and securely folded flat with the included folding key. Take advantage of the low-profile design, which makes it easy to slide the machine under surfaces and move it from room to room.
  • FOLDING TOOL: Turn the tool counterclockwise in the frame locks to fold the treadmill frame. After it is folded, use the treadmill key to secure the frame in place. Keep the tool handy by placing it in its dedicated slot at the base of the treadmill.
  • PLAY YOUR TUNES: Connect your music device to the onboard 3.5mm headphone port to listen to music through the integrated speakers on the treadmill. Mount your favorite devices on the treadmill by using the convenient tablet holder.
  • STURDY BUILD: This treadmill supports a maximum user weight of 220 lb. Walk or run against the running deck equipped with shock-absorption to reduce impact on your joints compared to exercising on concrete or other hard surfaces.
  • POWERFUL MOTOR: This machine is powered by a 2.5-peak horsepower motor that supports speeds from 0.6MPH to 8MPH. Change your speed in an instant with the on-console quick buttons.
  • VERSATILE TRANSPORTATION WHEELS: Two sets of transportation wheels allow you to move the treadmill forward, backward, left, and right when it’s folded flat. This makes it easier to move, position, and store the treadmill when it is not in use.

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Frequently bought together

  • Sunny Health & Fitness ASUNA Space Saving Treadmill
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  • 100% Silicone Treadmill Belt Lubricant - Made in The USA - with Both a Precision Twist Cap and an Application Tube for Easy, Full Belt Width Lubrication
Total price: $740.23
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From the manufacturer

best slim fold treadmills best home gym treadmills for exercise pink treadmills best home gym treadmills SF-T7874 SF-T7955
Asuna Space Saving Treadmill, Motorized, Low Profile & Slim Folding - 8730 Asuna Space Saving Treadmill, Motorized, Speakers for AUX Audio Connection-8730G ASUNA SpaceFlex Motorized Running Treadmill, Wide Treadmill, Space Saving- 7750P ASUNA SpaceFlex Motorized Running Treadmill, Wide Treadmill, Space Saving- 7750 Sunny Health & Fitness Electric Folding Treadmill with Auto Incline - SF-T7874 Sunny Health Fitness Evo-Fit Treadmill w/ Bluetooth & Device Holders - SF-T7955
Running Surface 49L x 17.75W in 49L x 17.75W in 51L x 19W in 51L x 19W in 54L x 18W in 54L x 20W in
Incline Levels - - 12 - Auto Electric 12 - Auto Electric 14 - Auto Electric 18 - Auto Electric
Digital Monitor Distance, Time, Step/Time, Steps, Calorie, Speed Distance, Time, Step/Time, Steps, Calorie, Speed Incline, Pulse, Calorie, Time, Program, Distance, Mode, Pedometer, Speed Incline, Pulse, Calorie, Time, Program, Distance, Mode, Pedometer, Speed Speed, Time, Heart Rate, Distance, Calorie, Incline Speed, Incline, Heart Rate, Time, Distance, Calories
Speed Range 0.6 - 8.0 MPH 0.6 - 8.0 MPH 0.6 - 8.0 MPH 0.6 - 8.0 MPH 0.6 - 11 MPH 1.0 - 11.5 MPH
Shock Absorption
I/O Connections MP3 Port, Speakers MP3 Port, Speakers USB Charge Port, MP3 Port, Speakers USB Charge Port, MP3 Port, Speakers MP3 Port, Speakers Speakers, USB Charge Port, Fan Function
Max User Weight 220 lb 220 lb 220 lb 220 lb 285 lb 275 lb

Product description

Save space and pack a powerful workout with the Slim Folding Motorized Treadmill by Asuna. Supporting up to 220 lb, this space-saving running deck (49Lx17.5W) is equipped with shock absorption technology that reduces impact on your joints when you exercise. Powered by a 2.5-peak horsepower motor, the indoor treadmill can support walking and running speeds between 0.6mph and 8mph. Use the 4-window display to visualize your workout performance. Keep track of distance, time, calories burned, and speed at a glance. Make quick adjustments to speed by using the on-console quick buttons. And take advantage of the built-in pedometer to monitor your total steps during your exercise sessions. Control your workout entertainment by mounting your favorite smart device on the tablet holder. Bump up your workout with your favorite tunes when you connect your music player to the onboard MP3 sound system. Designed with portability in mind, use the transportation wheels to move the treadmill, and store the motorized treadmill under raised surfaces. Use the folding tool that’s located on the base of the treadmill to fold the treadmill flat (measuring 64L x 30.5W x 4.5H inches when folded flat) and lock the frame in place.

Product details

  • Date First Available : August 4, 2020
  • Manufacturer : Sunny Health & Fitness
  • ASIN : B08F9XLW1N
  • Customer Reviews:
    4.4 out of 5 stars 813 ratings

Customer Questions & Answers

Customer reviews

4.4 out of 5 stars
4.4 out of 5
813 global ratings
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Top reviews from the United States

Reviewed in the United States on April 8, 2019
Style: 8730GVerified PurchaseEarly Reviewer Rewards(What's this?)
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5.0 out of 5 stars Loving this treadmill
By a.B. on April 8, 2019
When I was looking for a treadmill, there were two key features for me. 1) I live in a small condo, so I wanted one that folded flat down for easy storage under my bed. 2) I also wanted at least 5-6mph speed capability.

This was one of the only treadmills I found to fit those criteria. It seems very sturdy, well made, and perfect for my needs. I’ve used it for 2-weeks now, for at least 20min every day, running over 5mph, and pulling it out plus folding it up for storage after each use as well. No issues, it’s working great thus far.

Note: I am 5’4” and about 115-lbs. It’s size is perfect for my stride and it’s sturdy under me. The handle bars are a little lower than typical gym treadmills, but it looked like most foldable treadmills are that way, and you do get used to it. That said, I would not recommend this for use by my 6’4” and 180-lb husband.

What I love - sleek design, very low profile for storage, 8mph max speed

What I want to disclose - it has a bit misleading advertisement. The video shows a couple things that I would argue about. First of all, while it is correct about the low profile dimension of 4.5”, the picture of the couch on top of the treadmill could only be possible if you picked up the couch and put it on top of it. To roll it under something, you must do so at an angle by lifting the short end where the handles fold down to. I have about 10-11 inches of clearance under my bed and that is about the minimum height you need at the handle end to allow it to roll. If you lower it to about 9-10 inches, the rubber on the bottom that secures it in place when it’s flat will stop it. I also am not sure how well these rollers would work on carpet either. I have wood floors throughout.

The other misleading portion of the video is the set up time. To safely operate the treadmill the folding bars must be locked in place. To move it, the bars also must be locked in the folding positions. That means I need to untighten the locks when I pull it out of storage and retighten them to operate in the upright position. To do so, the hex locks take about 5-6 full circle (360-degree) turns on both arms (i.e. each side of the treadmill). Not a quick single turn and not only on one side as the video shows, claiming a 12 sec setup. To pull it out from under my bed, plug it in, and set up the handle bars takes me about a minute and a half, which is still pretty awesome to me and I’m very happy with it. But I just wanted to point out the flaws in the video to curb your expectations.

I also had a good customer service experience with the seller, Sunny Heath and Fitness. While the box was badly damaged when it arrived, to my surprise, the treadmill itself was not impacted. However the lubrication oil bottle was cracked. I had no trouble contacting the seller and getting replacement lube bottles shipped out to me right away.
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276 people found this helpful
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Reviewed in the United States on September 19, 2019
Style: 8730Verified Purchase
201 people found this helpful
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Reviewed in the United States on May 21, 2020
Style: 8730Verified Purchase
148 people found this helpful
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Reviewed in the United States on August 8, 2020
Style: 8730GVerified Purchase
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1.0 out of 5 stars Non-existent Support gets 1 star - Please read for detailed information
By Underwater Surfer on August 8, 2020
I received this treadmill on 6/4/2020. My male body is 6' tall and weighs 194 lbs, which is much lower than the 220 lb limit. I had problems from the beginning. I finally contacted Sunny Health and Fitness on 7/13/2020. I received the following automated response.

"Thank you for contacting Sunny Health & Fitness. We will respond to you as quickly as we can. Your ticket is 17730081."

About 20 minutes later I received the following:

"To process your request, we still need the below information. Please provide:

- Your Phone
- Serial Number
- Address
- Proof of Purchase (for warranty issues only) - What is this?

Once we have all the above, we can provide the best solution.

Have a Sunny Day!


I replied with all the information and have never received another email from them, and today is 8/8/2020, but I have sent 4 emails to them with the ticket number in the subject heading, with sound recordings, a photo, and a video, with the last 2 attached to this review! The poor quality photo shows that the motor is turned about 2 degrees, so the pulleys aren't parallel. This puts stress on the belt and might cause a failure. The video shows the treadmill belt while the motor is running, and every complete rotation shows a jump in the belt. This is probably a poorly manufactured belt.

Search for "Asuna 8730G user manual" to find the user manual. Pages 2 and 3 have exploded diagrams, which might help while reading this. You will need to turn them 90 degrees clockwise to see them clearly.

On page 3 you can see the uprights assembly. At the bottom of both the right and left uprights you will see parts 68, 6, and 47. On page 2, in the middle of the main frame, you will see parts 78 and 76 for both sides. These last parts are washers and nuts that screw onto the end of the bolts, part 68. At the head of those bolts is where one inserts the included tool to loosen and tighten the arm assembly so it can be moved up and down. This whole area didn't seem to have very much if any lubrication, so I could hear metal on metal squeaking when turning the bolts, which were very hard to turn. I removed these parts, cleaned everything in the area, and reinstalled the parts after putting on a good amount of silicone grease. The bolts turn much more easily, but there still is a feeling of metal on metal which doesn't feel good. Part 47, listed above, is a large VERY STRONG compression spring, and it might be the cause of the metal on metal feeling, as it puts a tremendous pressure on the threads. I don't know if this is just bad design or a manufacturing problem.

On page 3, you will see the main structural supports label 2R and 2L. At the bottom of those is a mechanism that is not shown separately. When the uprights are upright, and the 2 bolts (part 68) have been loosened, one still needs to push firmly, for a few inches, on the whole upright assembly to lower it. The mechanism I mentioned is what creates the resistance and then releases. It took quite a bit of force to get it to work, so I sprayed some silicone into those areas, which is between the base and the bottom of the uprights, and it is so much easier to move now! So this is another area that didn't seem to get the lubrication.

Trying to remove a noise I sometimes hear, I have tightened all the screws and bolts that I can find, and even took off the motor cover from the top to see if there was anything in there that might be causing the sound. The belt is tightened so that the middle of it can be lifted about 2" to 2 1/2", and is centered on the rollers. The sound isn't loud at all, and it only happens maybe 20 % of the time, but it makes me feel that something is wrong, but this is my first treadmill so I don't know what is to be considered OK. I run a little at 4 mph, but mostly walk at 2.2 mph. I seem to hear the noise more after running, and it seems to be in sync with my left foot to some degree. If I move both feet to the right it seems to go away, but when I move back to the left it returns. There is also a fairly loud squeak that comes from the right front side, but it is also intermittent

I contacted support at Amazon, and the woman I dealt with was very nice and spent 5 days trying to reach support. She got to them once and they didn't want to talk but just asked that I send a video to them. I contacted another Amazon support person and explained everything all over, and that person ended up transferring me to someone at a higher level. She was able to contact support at Sunny. I then had a conversation with a man who was very nice. He didn't really understand the product but stated they had one. I had him look at my emails and the attachments. Then had him look at the user manual as I explained the problems. He didn't seem to have any personal knowledge, but told me he would talk to the manager and call me back before 5 PST. I have never heard from anyone at Sunny Support.

One good thing about all of this, is that I am much more aware of the machine and how to maintain it. I do like the treadmill because it can be stored vertically leaning against a wall and takes up little space. My concern is that because of all the problems that it will fail; and because Sunny Support basically doesn't exist, that I won't ever be helped.

Update 1:

Being bothered by the metal on metal scraping feeling when turning the#68 bolt, I decided to take it apart, once again, and measure the spring with a digital caliper. The diameter of the wire of the extremely strong compression spring (part #47) was 2.5mm, with the outside diameter of the spring being 23mm, the inside diameter being 18mm, and the length 18mm. I purchased some springs on Amazon that were 1.2mm wire to replace the included ones, as their whole purpose is just to push out on part #6, thus allowing the upright to be raised and lowered. These were approximately 1/4 of the strength of the included springs, and were strong enough to easily push out part #6. I also purchased some "Permatex 81343 Anti-Seize Lubricant, 1 oz. Tube" on Amazon. I cleaned off all the parts and put the springs on the end of part #6, and then put the Anti-Seize Lubricant on the #68 bolts. This greatly reduced the friction when turning the bolts, and made it feel better, but even then I can feel a slight metal on metal grinding.

I think this whole assembly is a bad design. Wouldn't it be easier to have a mechanical button to lock and unlock the uprights?

Update 2:

Please watch the manufacturer video on Amazon. At :59 seconds there is a supposed demonstration showing the "Simple Setup", which they show only takes 12 seconds! This is a total lie! I have been using this treadmill 2 times a day for 67 days, and can set it up and take it down fairly quickly. I timed myself for the whole process and it took me 3:36, which includes about 1:48 for setup, and the same for tear down. That amount of time isn't that great, but the outright lie in the video bothers me greatly. I have it against the wall and only need to move it 10 feet and lower it, which doesn't take much time. Then I need to plug it in and unscrew the #68 bolts (one on each side), with each needing to be turned about 3 full turns (or 6 half turns). Then I raise the upright assembly, and then need to tighten the #68 bolts with each needing to be turned about 3 full turns (or 6 half turns). Then I can rotate the handles and tray into place and turn it on. In the video she only turns the bolt on the front right 1 full turn (or 2 half turns), which isn't enough to even be able to raise (or lower) the upright assembly.

Update 3:

I am spending all this time and energy to of course be helped by support, but mainly it is to help the company realize their support is very poor, and that their dishonesty exposes problems within the company. I think this treadmill has great potential, so I wish they would fix all their problems and be honest, as it could sell very well.

I posted much of the first part of this review on their website (sunnyhealthfitness.com), but they didn't post it for people to read. Then I asked why they are only posting 4 and 5 star reviews. Finally they posted it, and added the reply below. It seems they do this as a marketing strategy, as you can see on some of the 1 star review comments here on Amazon. The question is, do they ever actually work with the customer and fix the problems. In my case, the answer is no. Here is what they added to my review on their website, but I have never been contacted, and they don't allow people to reply to their comment.

"Sunny Health and Fitness

Thank you for bringing this to our attention. We sincerely apologize for your experience and for the delay in communication. Our support team has been dealing with an overwhelming number of tickets and they are working as quickly as they can to service all of our customers. We want to get you up and running as soon as possible and will have a team member reach out to you shortly. Thank you for your patience and understanding!"

Update 4:

I was using my treadmill at 2.2 mph, but with my 194 pound body every step would slow the motor a bit and then it would speed up again. I increased the speed in .1 mph increments and it got better. When I reached 2.7 mph the motor was steady. Being that the treadmill is rated for a 220 lb person, it will probably be worse for a body of that weight. It seems that the manufacturer is more interested in the marketing of the highest speed of 8 mph, than they were in optimizing it for people using it at the most common speeds.

If I press down on the arms, which in effect transfers the body weight to the frame, I can stop the varying motor sound. So if one has a body that is maybe 150 lbs they might not experience this problem. My concern is that using it at 2.2 mph will hurt the motor more. It works fine at 2.7 mph, so that is the slowest speed I use.
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Top reviews from other countries

Amazon Customer
1.0 out of 5 stars Worked great until it didn't...
Reviewed in Canada on May 13, 2020
Style: 8730Verified Purchase
21 people found this helpful
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Amazon Customer
1.0 out of 5 stars Don't buy if you live in Canada
Reviewed in Canada on October 27, 2020
Style: 8730Verified Purchase
14 people found this helpful
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5.0 out of 5 stars Very good quality
Reviewed in the United Kingdom on December 31, 2019
Style: 8730GVerified Purchase
Shawn Jung
5.0 out of 5 stars Great treadmill for home
Reviewed in Canada on March 20, 2020
Style: 8730Verified Purchase
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5.0 out of 5 stars Great treadmill for home
Reviewed in Canada on March 20, 2020
I like the size of the product, very good to have a quick running whenever you stay home. I hope it has a good durability for many years.. I don’t really see any warranty information here, but I can see the warranty info in their website, seems 3 years from purchase date.
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10 people found this helpful
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2.0 out of 5 stars It was great till the running board cracked!
Reviewed in Canada on June 11, 2020
Style: 8730Verified Purchase
8 people found this helpful
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