The Merax 3.0 HP Folding Treadmill is a budget-friendly compact treadmill that folds down to about 4.7 inches tall. It pairs a 3.0 HP motor with a 0.5–10 mph speed range, a 15% manual incline and a 41.73 × 15.35-inch belt, and it supports users up to 300 lb.
It ranks #1 in our best treadmill under $300 guide, #2 in our best cheap treadmill picks and #3 in our most compact treadmill guide. This review covers how it runs, where the narrow belt and short warranty limit it, how it stores and which alternative to choose if it is not the right fit.
Merax 3.0 HP Folding Treadmill Review: The Short Answer
OUR VERDICT
FITSCORE 68/100
Merax 3.0 HP Folding Treadmill
Buy it if you want real jogging speed and steep incline in a treadmill that slides under a bed. Skip it if you need a wide deck, automatic incline or more than a 1-year warranty.
- 3.0 HP motor, 0.5–10 mph, 15% manual incline
- 41.73 × 15.35-inch belt, 300-lb capacity
- Folds to about 4.7 inches tall, about 60.5 lb
Best Usage
- Jogging and light runs
- Incline walking at home
- Small apartments
Best For
- Tight budgets
- Under-bed storage
- Users up to 300 lb
Not For
- Wide or long strides
- Hands-free incline changes
- Long warranty coverage
Key Specs
- Motor: 3.0 HP
- Speed: 0.5–10 mph
- Incline: 0–15% (manual)
- Running Surface: 15.35 × 41.73 in
- Weight Capacity: 300 lb
Pros
- Up to 10 mph
- Folds about 4.7 inches tall
- Mostly pre-assembled
Cons
- Narrow 15.35-inch belt
- Manual incline only
- 1-year warranty
Merax 3.0 HP Folding Treadmill Specs at a Glance
| Spec | Merax 3.0 HP Folding Treadmill | What it means for you |
|---|---|---|
| Motor | 3.0 HP | Enough for walking, jogging and short faster runs. |
| Speed | 0.5–10 mph | Covers slow walking up to a 6:00 min/mile pace. |
| Incline | 0–15% (manual) | Steep hill walking, but you set it before you start. |
| Belt size | 15.35 × 41.73 in | Narrow and short for running; best for steady strides. |
| Cushioning | Silicone shock pads, 7-layer belt | Softens impact on hard floors. |
| Max user weight | 300 lb | Typical for budget folding treadmills. |
| Assembled size | 47.64 × 19.72 × 37.01 in (L × W × H) | Fits a small corner of a bedroom or living room. |
| Folded size | 47.64 × 19.76 × 4.72 in (L × W × H) | Low enough to roll under many beds and sofas. |
| Product weight | About 60.5 lb | Built-in wheels make it manageable for one person. |
| Console | Time, distance, calories, speed, heart rate; USB port | Covers the basics without an app or subscription. |
| Controls | Console and handle controls | Change speed without reaching for the console. |
| Noise | Listed below 55 dB | Aimed at shared spaces; owner feedback is mixed. |
| Warranty | 1 year, whole machine and accessories | Short, so check the unit carefully after delivery. |
Check Amazon for current pricing and availability.
Specifications are from the manufacturer listing. Confirm the current model and warranty terms on the product page before ordering.
Merax 3.0 HP Folding Treadmill FitScore
FitScore rates each treadmill on structured product data, weighted for one buying intent. The Merax 3.0 HP Folding Treadmill is bought mainly as a low-cost home treadmill, so this review uses the same weights as our best treadmill under $300 guide, where it ranks #1 with the same score. Performance and affordability count most (20% each), then durability, comfort and practicality (15% each), noise (10%) and features (5%), because a budget buyer wants the most usable machine for the money without giving up too much in build or comfort.
FitScore for Budget Buyers
How this FitScore was calculated
This FitScore combines 7 category scores using the weights of the buying intent above.
- Affordability (100): one of the most budget-friendly ways to get 10 mph and 15% incline.
- Performance (89): strong speed and incline range for the class, held back by manual incline.
- Practicality (79): folds to about 4.7 inches tall, weighs about 60.5 lb and is mostly pre-assembled.
- Durability (49): alloy steel frame and 300-lb rating, but only a 1-year warranty.
- Comfort (33) and noise (46): the narrow belt limits running comfort, and owner noise feedback is mixed.
Design and Build Quality
The Merax uses an alloy steel frame rated for 300 lb. Assembled, it is about 47.6 inches long and 19.7 inches wide, which is small enough for an apartment bedroom or a corner of a living room.
Owners describe it as compact and simple to use, and many say it suits small apartments well. At about 60.5 lb with built-in wheels, it is light enough to roll out for a session and back into storage afterward.
Bottom line: a small, simple frame that fits where full-size treadmills do not.
Motor and Running Performance
The 3.0 HP motor drives a 0.5–10 mph speed range. That is noticeably faster than most fold-flat walking pads, so you can jog and run short intervals instead of only walking.
Speed changes can be made from the console or from the handle controls. The limit is the deck rather than the motor: at higher speeds, the short, narrow belt leaves little room for a long running stride.
Bottom line: fast enough to jog and run, as long as your stride is compact.
Running Deck and Cushioning
The belt measures 41.73 × 15.35 inches. The length is fine for walking and easy jogging, but the 15.35-inch width is narrow, so you need to stay centered, especially at speed.
Merax pairs a seven-layer belt with large silicone shock pads and absorbers to soften each step. Some owners mention that the belt can drift side to side, so plan to check tracking and adjust it as needed.
Bottom line: comfortable for walking and jogging, tight for faster running.
Incline and Programs
The 15% incline is steep for a treadmill this size, but it is manual. You set the angle before you start rather than changing it with a button mid-workout.
The listing does not describe built-in workout programs. The console shows time, distance, calories, speed and heart rate, so you build your own sessions or follow a plan from your phone.
Bottom line: steep incline for the money, but not for quick hill changes.
Console and Controls
The console covers the basics, including real-time workout data and a USB charging port. There is no touchscreen, no app ecosystem and no subscription to pay for.
Some owners report that the remote can stop pairing, so it is worth testing all controls when the treadmill arrives. Use your own phone or tablet if you want entertainment while you train.
Bottom line: simple controls with no ongoing costs.
Footprint, Folding and Noise
Folded, the Merax is about 47.6 × 19.8 inches and only about 4.7 inches tall. Merax notes that the four assembly knobs should be removed before folding, after which the wheels let you slide it under a bed or sofa.
Merax lists noise below 55 dB, but owner feedback on noise is mixed. A mat helps on hard floors and in upstairs rooms.
Bottom line: one of the easiest budget treadmills to hide away.
Setup, Warranty and Support
Most of the treadmill arrives pre-assembled, and setup mainly involves tightening four knobs. That makes it one of the quicker treadmills to get running.
Coverage is a 1-year quality assurance on the whole machine and accessories, with 24/7 support listed. Some owner feedback on related Merax folding models points to durability concerns within the first year, so register the warranty and inspect the unit early.
Bottom line: quick to set up, with short coverage.
Merax 3.0 HP Folding Treadmill vs Rivals
Here is how the Merax 3.0 HP Folding Treadmill compares with three other budget picks, using the same budget FitScore weights.
| Comparehead to head | THIS REVIEW | ALTERNATIVE 1 | ALTERNATIVE 2 |
|---|---|---|---|
| Motor | 3 HP | 1 HP | 3 HP |
| Speed | Up to 10 mph | Up to 6 mph | Up to 8 mph |
| Incline | 0–15% | 0–13% | 0–15% |
| Running Surface | 15.35 × 41.73 in | 15.7 × 39.3 in | 14.17 × 40.94 in |
| Weight Capacity | 300 lb | 265 lb | 300 lb |
| Warranty | 1 year frame, 1 year motor, 1 year parts | 3 years frame, 3 years motor, 3 years parts | 1 year frame, 1 year motor, 1 year parts |
| Check Price | Check Price on Amazon | Check Price on Amazon | Check Price on Amazon |
Alternatives to the Merax 3.0 HP Folding Treadmill
Slimmer and lighter: Choose the Merax Foldable Treadmill With Incline if you want the same 15% incline and 300-lb rating in a lighter 46.3-lb frame, with a top speed of 8 mph.
Longer warranty: Choose the SereneLife SLFTRD26BT if you want a 3-year warranty and 13% incline, and you stay under 265 lb and 6 mph.
Final Verdict
The Merax 3.0 HP Folding Treadmill is the budget treadmill to check first if you want to jog at up to 10 mph and still slide the machine under a bed. The narrow belt, manual incline and 1-year warranty are the trade-offs. If you mostly walk and want a lighter frame, the Merax Foldable Treadmill With Incline is the simpler fit.
Merax 3.0 HP Folding Treadmill FAQ
Yes, if you want a budget-friendly treadmill that can jog and store flat. It offers 0.5–10 mph, a 15% manual incline and a 4.7-inch folded height, with a 1-year warranty.
Yes, for jogging and short runs. The top speed is 10 mph, but the 41.73 × 15.35-inch belt is short and narrow for long running strides.
The maximum user weight is 300 lb.
No. The 15% incline is manual, so you set it before your workout rather than with a button.
Yes. After removing the four knobs, it folds to about 47.6 × 19.8 × 4.7 inches and rolls on built-in wheels.
No. The console shows time, distance, calories, speed and heart rate, and no paid plan is required.
Merax lists a 1-year quality assurance on the whole machine and accessories. Confirm current terms on the product page.
Explore More Treadmill Guides
Best Treadmill Under $300 (2026): 5 Budget Picks Compared
Best Cheap Treadmill (2026): 5 Affordable Picks Ranked
Most Compact Treadmill (2026): 5 Small-Footprint Models Compared
Best Budget Treadmill (2026): 5 Affordable Picks Ranked
Best Treadmill Under $500 (2026): 5 Affordable Picks Ranked
Best Walking Pad Under $200 (2026): 5 Affordable Picks
This article contains affiliate links. If you click through and make a purchase, we may earn a small commission at no extra cost to you. As an Amazon Associate, we earn from qualifying purchases. We do not show prices because they change constantly: product details and availability can change at any time, so please check the current price and details directly on Amazon. Learn more. Amazon and the Amazon logo are trademarks of Amazon.com, Inc. or its affiliates.
