Our Ratings are 4.77 Stars out of 5 Stars from 22.302 Reviews as of 7/17/2023

Lifespan TR4000i Treadmill Review

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How long will the Lifespan TR4000i last?

Built with durability in mind and quality steel, the Lifespan TR4000i Treadmill has an assembled weight of 239.5 lbs. and can hold users up to 350 lbs. Moderate joggers to light runners are best suited for this treadmill and should get many years of service out of this machine with a proper care and maintenance schedule. Lifespan backs this purchase with a lifetime frame and motor warranty, 5 years parts, and 1 year labor. The inclusion of lifetime warranties demonstrates the quality of the treadmill, and the faith Lifespan has in its longevity.

Brief Overview

The Lifespan TR4000i Treadmill is appealing on several fronts to most fitness enthusiasts due to its updated features and quality components. While simplistic in nature, it offers a hint of technology and a great deal of long-lasting elements that blend into a decent treadmill offering for less than $2500. If your focus is on cardiovascular health and do not need entertainment options while exercising this treadmill might be the one for you. Honestly though, if this machine is in your budget, you probably have a TV you can watch while working out making the extra features unnecessary.

Overall Quality

The Lifespan TR4000i is a folding treadmill that appeals to light runners due to its upgraded parts and larger running area. With a measurement of 22” x 60”, there is plenty of room for taller users to stretch their legs and the width will allow arm swingers to go to town without bruising themselves with fluctuating movements. Ample room for all sizes. A 3.25 HP CD motor is another upgrade and provides smooth performance and speeds up to 12 MPH, and those that with forceful strides will delight in the 8 shock absorbers that lighten impact on lower extremities while muffling noise. It is imperative to note Lifespan has decreased the incline to 13 but added in a -2-decline feature which is vastly appealing to those who want to fully intensify their workouts. The Lifespan TR4000i treadmill offers a modicum of technological capabilities built in that keep users connected through Bluetooth capabilities. The Lifespan app accepts transmitted heart rate information and integrated speakers allow users to jam along to their favorite tunes while reaching exercise peaks. There is a USB port for charging devices which is handy at times. The console itself has a 7” full color touchscreen that alternate between 3 different display views while 50+ programs keep even a jaded workout fan focused on increasing training. Finally, 4 wheels help move the foldable frame to the side when exercise time is complete for optimal space saving ability.

Things we like

  • warranty
  • larger running
  • space
  • decline feature

Things we dislike

  • X
    low on technology


Belt Size 60"L x 22"W
Drive Motor 3.25 HP Continuous Duty DC
Belt Type 2.2mm Thick Belt
Incline Motor 800 lbs Maximum Lift
Rollers 2.5" Front, 2" Rear
Speed Range 0.5 to 12 mph
Incline 13 Levels
Deck Suspension 8 Independent Compression Shocks
Deck 1" Phenolic
Folding System EZfold™
Transport 2 Front-Mounted and 2 Rear-Mounted Wheels for Easy Forward/Backward Mobility and Storage
Side Rails: Non-Slip Plastic Side Rails Provide Balance and Safety while Starting and Stopping the Treadmill Belt
Dimensions: Unfolded: 73"L x 34.5"W x 55.5"H, Folded 40.5"L x 34.5"W x 65.5"H
Step-Up Height 9"
Max. User Weight 350 lbs
Power Requirements Requires a 115V NEMA 5-15 Non GFI Circuit


We invite you to see our other treadmill reviews to help you narrow your search for your next fitness machine.


The TR4000i is a hardy treadmill that offers quality features and is backed by an incredibly generous warranty by Lifespan. The TR4000i is designed with a variety of features and the added decline adds to the overall value of this machine to both joggers and runners who want to push themselves further into optimal workout zones. It is budget-friendly and while not on par technology-wise with other models in its price range, the quality build and generous warranties make it a great investment for those who need the space saving ability of a folding treadmill.

Customer Reviews

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Clemencia Colmenares- Disappointing!Jul 23, 2020

I bought my treadmill about a year and a half ago, and I use it for fast walking, about 4 days/week. Over the past 4 months, due to the pandemic, I’ve used it more. It started to stop suddenly (a safety problem!) and the problem has gotten worse. The error is always DC4, which indicates a need for lubrication, but the error persists in spite of my lubricating it as indicated. When I called customer service, I was informed that it needed a new running belt. MIT is still under warranty but will take several weeks. I will post an update, but very disappointing!

Fernando Larios- WORST MACHINE EVER-DO NOT BuyAug 11, 2020

Worst machine ever had it for almost 2 years but has never worked properly since we got it and have been working with LIFESPAn and all they say is will replace parts until the warranty is up after that can not do anything for you, don't waste your time and money on anything LIFESPAN WORST machine ever and customer service!