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Editor’s Note: The ProForm ZT4 treadmill is no longer in production. We suggest viewing the ProForm City L6 or the Horizon T101 as the best alternatives, or check out our Best Budget Treadmills roundup for more options.

ProForm has been around since the 1980s and still produces affordable, quality cardio machines to this day. With such a storied history, it’s no surprise that the company has retired products to make way for the latest and greatest. The ProForm ZT4 is one of those machines. 

The ProForm ZT4 treadmill is an entry-level machine that was sold by the brand in the mid 2010s. It’s been discontinued, but we’re sure there are still some floating around out there. So if you’re looking to replace your ZT4 or find a similar product, check out this ProForm ZT4 review to learn everything you’d want to know about this piece of exercise equipment. 

We’re Like, Famous, For Our Fitness Equipment Reviews 

Team GGR has expertise in all things fitness equipment, and we can rattle off lists of the best treadmills, the best ellipticals, the best barbells, and more at the drop of a dime (You checked out our Fitness Most Wanted Awards, right?). As certified personal trainers, CrossFit Level 1 Trainers, and former college athletes, we know what products deserve all the kudos, and what’s effective to help ourselves, and our clients, meet fitness goals. 

Looking for an Alternative to the ProForm ZT4?

Since the ProForm ZT4 is discontinued, we recommend two alternatives: the ProForm City L6 or the Horizon T101. If you want to stick with ProForm, the former is a similar price, albeit a slightly different machine. The latter option from Horizon is also similarly priced, and has almost identical specs to ZT4. (Editor’s note: On October 27, 2023, two models of the Horizon T101 treadmill with serial numbers starting with TM 734 and TM 486 were recalled due to the machine unexpectedly changing speed or stopping.)

Best Alternative to ProForm ZT4
ProForm City L6 Folding Treadmill
ProForm City L6 Folding Treadmill

The ProForm City L6 Folding Treadmill is the currently most affordable treadmill offered by ProForm. The L6 does not come with a built-in screen, instead it has a device holder for your table or phone. Similar to the other ProForm models the L6 utilizes iFIT programming with trainer-controlled speed, but you will have to stream classes from your phone or tablet.The L6 has a tread belt size of 17.5 by 45 inches, which is on the smaller side, but this treadmill is built to be compact. The overall footprint of this treadmill is 29 inches wide by 70.25 inches long and 44.5 inches tall. The treadmill handlebars fold down so it can be stowed away. The 1.6 CHP motor can achieve speeds of 0-8 miles per hour.There are limited online reviews of the L6 treadmill. Most users had positive experiences, enjoying the quick and easy assembly and compact design. One user did have the treadmill arrive broken and had difficulty with customer service. At the time of publishing, there are no user reviews about using iFIT with the L6 treadmill.

Best Alternative to ProForm ZT4
Horizon Fitness T101
Horizon Fitness T101

The Horizon Fitness T101 is a great no-frills treadmill equipped with all the basic features needed to do some walking or light jogging. Simply hop on the treadmill, choose from one of the five on board workout programs and get going. Stay connected and entertained by plugging in your device and workout to your favorite music, TV show or workout program. With convenience in mind, the T101 allows you to quickly shift speed and incline automatically with one-touch keys. The Horizon T101 does not have a traditional display. Instead, there are digital number boxes that display your most important workout metrics: time, calories, speed/incline, distance and heart rate. While the 2.5 continuous horsepower motor may not be as powerful as some, it sure is quiet. Reviews state that this durable motor is surprisingly quiet. Horizon claims that noise is minimized as the motor runs at a lower RPM which also increases efficiency. As with most folding treadmills, the Horizon T101 running surface runs on the smaller side measuring 55 inches by 20 inches which may be a limiting factor for taller individuals. While the running surface may fall on the small side, it still features a three-zone cushioned deck to protect your joints and spine. The compact nature of the T101 makes it easy to fold using a one-step hydraulic folding system to store your treadmill when not in use.

A Quick Look at the ProForm ZT4

ProForm offers cardio equipment at a more affordable price range than its sister company, NordicTrack, and the discontinued machine we’ll be talking about in this treadmill review is no exception.

The ProForm ZT4 is a budget-friendly, simple-to-use folding treadmill best-suited for walkers and casual runners. While this machine does have a cushioned deck, the tread belt is only 50 inches long and the motor is 2.75 horsepower, so it won’t work well for anyone who wants to log serious miles.  


  • Foldable
  • Decent user weight capacity
  • Up to 10% incline 
  • Plenty of built-in programs


  • Short running deck
  • Motor won’t be suitable for serious runners
  • Speed range is lacking
  • Small LCD display

ProForm ZT4 Specs

Footprint70” L x 33” W x 53” H
FoldableYes, with EasyLift Assist
Weight155 lbs
Weight capacity300 lbs
Motor2.75 CHP Mach Z motor
Walking belt18” W x 50” L
Display5” LCD
Speed10 MPH
Programs16 built-in programs 
Heart rate monitoringYes, via EKG pulse grips 
Warranty5-year frame and motor, 90-day parts and labor

Footprint, Portability, and Durability

One shining characteristic of the ProForm ZT4 is its spacesaver design; the deck folds up toward the console with ProForm’s EasyAssist folding mechanism, which we’ve used before and enjoy. There are transport wheels, too, so you can move it more easily once it’s folded up. Even though this machine does have a small footprint of only 70 inches long by 33 inches wide by 53 inches high, it’s nice to have the extra flexibility for a small home gym.   

Now, because this is a budget machine, sacrifices have to be made, starting with the short running area at 18 inches wide and 50 inches long. Next, the motor, at only 2.75 CHP, won’t be great for people who want to run long and hard, but should be fine for those who just want to walk for short bouts daily. 

However, the 300-pound weight capacity of the ZT4 is right at industry standard, and makes it more inclusive for exercisers of varying sizes. I’ve tested the ProForm Carbon T7, a successor of the ZT4 that has very similar mechanical specs, and did experience some shaking when I was running. I’m nowhere near the weight limit, so that’s something to consider if you’re looking to replace your ZT4 with a similar machine from the same company.  

pro form carbon t7
An image of the ProForm Carbon T7, a good alternative to the ZT4


While we haven’t personally tested the ZT4, we can make some assumptions on how it feels to use this machine because of our experience with other cardio machines that showcase similar specs. 

We like the ZT4’s ProShox cushioning, a cushioning system we’ve experienced before—and enjoyed—on other ProForm models like the Pro 5000. There are short handrails on each side of the ZT4’s deck, which walkers may appreciate, as well as quick-select buttons for speed and incline on the console.

Because the running surface is on the smaller side—at 18 inches wide by 50 inches long, it’s suitable for walkers—tall people or runners should consider a different model with more room to stride. 

The ZT4 does feature a Coolaire workout fan at the bottom of the console area, but some Amazon customer reviews from shorter users said the placement was less-than-ideal, blowing air directly into their eyes.  

Technology Benefits and Conveniences

There aren’t too many tech benefits on the ProForm ZT4. Because it’s an older model, the only thing you’ll see is iPod compatibility (do you still have one of those?) so you can play music from the two built-in speakers. 

There’s a basic LCD display screen on this treadmill from which you can view stats like time elapsed, distance, and calories burned, or follow along to one the 16 built-in workout programs. While these built-in workouts are a nice touch, if you’re interested in iFIT or Bluetooth capabilities, you should look at a more recent model like the ProForm Carbon T7. 

monitor on proform carbon t7 treadmill
An image of the ProForm Carbon T7 monitor

The ZT4 also comes equipped with pulse grips on the handrails for heart rate monitoring—while these aren’t the most accurate, for an older-model treadmill, you take what you can get. There’s a media shelf to store your phone, or iPod, while you’re walking, and there are dual water bottle holders on the console as well to help you stay hydrated. 

Final Verdict of Our ProForm ZT4 Review

The ProForm ZT4 treadmill has been discontinued by the brand, but the ProForm City L6 or Horizon T101 are good alternative options. If you’re looking for a machine with similar specs to the ZT4, consider this:

  • The ZT4 is an entry-level machine that would be most effective for walkers.
  • It is foldable and has a small footprint, so it’s suitable for small spaces
  • Tech capabilities are almost non-existent, so if that stuff is important to you, consider a more recent treadmill model. 

ProForm ZT4 Rating

ProForm ZT4

The ProForm ZT4 is an older-model treadmill from a respected brand. See how this entry-level machine stacks up in our ProForm ZT4 review.

Product Brand: ProForm

Product Currency: $

Product In-Stock: InStock

Editor's Rating:

ProForm ZT4

Footprint & Portability – 5

Setup – 3

Durability – 3

Customizations – 3

Adjustability & Ergonomics – 2.5

Tech Capabilities – 1.5

Conveniences – 4

Dynamic Programming – 1

Value – 4

Warranty, Financing, Returns – 2

If you’re interested in an alternative to the ProForm ZT4, check out the Horizon T101.

ProForm ZT4 FAQs

Is ProForm a good product?

ProForm makes quality cardio machines at an affordable price point, and many of their products have made our lists of the best in class, including the ProForm Pro 9000 as the best treadmill for running and the ProForm Carbon CX as the best budget exercise bike with a screen.

Is the ProForm 9000 worth it?

At $1,800, the ProForm Pro 9000 treadmill is an investment, that’s for sure. And whether it’s worth it depends on your goals and your budget. This machine is meant for serious runners, with its long tread belt, powerful motor, and incline and decline options. It also has a large 22-inch touchscreen, perfect for viewing iFIT workouts. If you don’t care about technology features and won’t be running much, consider a more budget-friendly option.

Does the ProForm 9000 have built-in workouts?

No, the ProForm Pro 9000 does not offer any on-board workouts. Instead, you’ll be able to utilize iFIT programming, which is integrated into the machine.

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