3G Cardio 80i Fold Flat Treadmill Review

Last Updated on May 24, 2021 by JP

Treadmill Overview

The 3G Cardio 80i Fold Flat treadmill is possibly the only machine on the market that is not only designed for runners but also has the capability to fold in two different ways. It also may be the only treadmill that folds to a small enough height that it can be slid under a bed without any problem. With two sets of wheels, this folding treadmill can be stored easily and conveniently.

Even with the ability to fold this machine, it’s still a treadmill. The belt is long enough for most running strides and it is able to reach higher speeds with a perfectly adequate 3.0 hp motor.

Click here to see the latest price on the 3G Cardio Treadmill on Amazon.

Technical Info:

Dimensions:3G Cardio 80i Fold Flat Treadmill

  • Height 39”
  • Width: 33”
  • Length 70”
  • Folded Dimensions:
    • Height: 9.75”
    • Width: 33”
    • Length: 74”
    • Item weight: 200
    • Max user weight: 325
    • Speed:
    • Minimum: .5mph
    • Maximum: 11 mph
    • Incline:
    • Minimum: 0%
    • Maximum: 15%


  • Folds in 2 directions to give you the maximum number of storage options. 2 sets of wheels let you move this treadmill where you need it with surprising ease. At just under 10 inches high when folded, you can put this machine under a bed or in a closet.
  • A good-sized belt accommodates running strides of even taller trainees.
  • One touch operation for speed and incline means that you spend less time fussing with buttons and more time getting your running done.
  • Enjoy versatile workouts with 8 built in programs plus 4 fully custom programs.
  • Solid warranty backed by excellent customer service.

3G Cardio 80i Fold Flat TreadmillComputer Features:

  • Heart rate sensors on the handlebars
  • Keeps track of your calories burned, speed, distance, time remaining/expired, incline and lap number.
  • Readout shows you the program that you are currently using.


  • Drive motor and frame: Lifetime
  • Parts: 5 years
  • Labor: 1 year

Shipping and Assembly

Prices and options will vary depending on where you buy the 3G 80i Fold Flat Treadmill. While it is always a bonus to be able to get free shipping, having this sent to a local store for pick up is a viable option as long as you have assistance to load and unload it.

A first for a treadmill of this size—there is virtually no assembly required. Cut open the box, slide it out, unfold it, and you are ready to go. The folding design allows it to be shipped fully assembled without causing the box to be overly bulky or too heavy.

What We Love About the 3G Cardio 80i Folding Treadmill

The Folding3G Cardio 80i Fold Flat Treadmill

We get it. More people live in smaller homes these days and do not have the room for a full-sized treadmill in one dedicated spot. There are some folding machines, but none of them fold in two different directions, and none of them fold small enough to fit under a bed. This is a unique feature that is relatively unheard of in the industry.

No Assembly Required

If you have ever had to put together a piece of furniture with many small parts, then you get why we were so happy to learn that this treadmill is good to go right out of the box. Instant treadmill, just add runner.

Awesome Customer Service

Question, comment or concern? You can reach 3G customer service in a variety of ways and in most cases get a quick, upbeat answer and a resolution to your problem. Even less than positive responses or outcomes are handled professionally and with people who not only know what they are talking about, but are able to communicate aptly.

Other Considerations

3G 80i Fold Flat Cardio TreadmillSlipping Belts

Trainees report that you need to make sure that their belt is securely in place every time they move this treadmill because there is a risk of it slipping over and bunching up or not feeding smoothly during a run. This could lead to a tripping hazard. Trainees should also know that the surface of this belt has been described as being more slippery than the average treadmill. While that could be user error or a faulty machine, it is worth noting and watching out for.

Double the Folding, Double the Pinch Factor

While it should go without saying, please be extra careful when folding and unfolding this treadmill and make sure that all children, pets and your own fingers are clear before proceeding.

How the 3G Cardio 80i Fold Flat Treadmill Compares to the 3G Pro Runner Treadmill

The running belt for the 80i Fold Flat is just slightly smaller than the Pro Runner treadmill. Both have the same size motor and the same basic monitor features. The Pro Runner can handle an extra 25 lbs of user weight and does fold for storage but does not fold to a height of under ten inches. Price-wise, they are within about $100 of each other. But, if storage is your primary concern for picking a folding machine, the 80i Fold Flat treadmill is your obvious choice.
3G Cardio 80i Fold Flat Treadmill

Final Word on the 3G 80i Fold Flat Treadmill

Trainees will be thrilled with the ability to fold this treadmill and stash it under a bed but still be able to get a full running workout when it is out. Most folding treadmills are unstable and barely have enough power to get the belt to a power walk speed, let alone a run. This one manages to let you run and run pretty quickly with a top speed of 11 mph. Another thing you typically have to give up with some folding treadmills is the ability to incline. The 80i Fold Flat inclines from 0-15%, making it a solid performance treadmill with some pretty amazing bonus features.

Click here to see the latest price on the 3G Cardio Treadmill on Amazon:



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