The WalkingPad X25 takes the double-fold idea from the smaller X21 and scales it up for running. It is a real treadmill with an upright console, a 10 mph top speed and a deck rated for 300 lb, but it still folds into a slab that rolls into a closet. This review sets out the published specs, the places where sources disagree, and the buyers it fits. We have not used the X25 ourselves. The review is built from KingSmith's WalkingPad.com and KingSmith.com pages, retailer listings at Abt and Walmart, and independent reviews by Treadmill Review Guru, TreadmillReviews.com, Connect the Watts and Torokhtiy. For the wider range, see our KingSmith WalkingPad review.
Key specs
Figures are from KingSmith.com and WalkingPad.com unless noted. Where the two maker sites differ, both figures are shown.
| Spec | WalkingPad X25 |
|---|---|
| Model | X25 (Abt lists TRX25F) |
| Motor | Brushless, 1.5 HP (KingSmith.com, Abt); 4.5 HP (WalkingPad.com) |
| Speed | 1 to 10 mph |
| Incline | None listed |
| Max user weight | 300 lb |
| Running area | 51.9 x 19.6 in |
| Unfolded size | 60.8 x 30.4 x 40.3 in |
| Folded size | 10.1 x 30.4 x 40.3 in |
| Weight | 104 lb net, 119 lb shipping |
| Handlebar | Upright console bar, not adjustable; no side rails |
| Speed control | SpeedDial knob or KS Fit app |
| Remote | No |
| App | KS Fit, Bluetooth, Apple Watch support |
| Cushioning | EVA and PET layers |
| Assembly | Fully assembled |
| Warranty | 1 year (Abt: 1-year limited on parts, frame, motor and deck) |
WalkingPad X25 vs X25+
KingSmith sells two versions, and retailers sometimes mix the names. According to WalkingPad.com, both have the same 1 to 10 mph range, 300 lb limit and 51.9 by 19.6 inch running area. The differences are:
- Side handrails. The X25+ adds foldable side handrails. The standard X25 has only the front console bar.
- Weight. WalkingPad.com lists the X25+ at 119 lb, against 104 lb net for the X25.
- Display. The X25+ page describes a light bar that shows progress in real time.
If you want something to hold on both sides, the X25+ is the version to find. Otherwise, the standard X25 is lighter to move.
Who the X25 foldable home running treadmill suits
- Runners short on space. A 10 mph top speed allows a 6-minute mile, which most walking pads and the 7.5 mph X21 cannot reach. TreadmillReviews.com named outdoor runners who need an occasional indoor backup as a good fit.
- Heavier users. The 300 lb rating is 60 lb higher than the X21 and the Denise Austin models. Our best walking pads for heavy people list covers other options at that level.
- Renters and apartment dwellers. Treadmill Review Guru's Sydney Kaiser named apartment living and portability as the X25's strengths.
- Walkers with a longer stride. At about 52 inches, the running area is longer than most folding pads, which TreadmillReviews.com saw as a plus for walkers.
It is not a desk walker. The upright console bar stands about 40 inches high in front of you, so it will not slide under a desk.
Planning space, speed and app use for the X25
Room to run
Unfolded, the X25 covers 60.8 by 30.4 inches of floor, close to 12.8 square feet, before you add clear space behind the deck. That is about 2 square feet more than the X21. Folded, it lies 10.1 inches thick, so check the height under a bed frame or the depth of a closet before you order. Rolling it into storage means moving 104 lb on small wheels, which is easier on hard floors than on carpet.
What 10 mph covers
At 10 mph you are running a 6-minute mile; 7.5 mph, the X21's limit, is an 8-minute mile. The extra range matters mostly for tempo runs and short fast efforts. Easy runs for many recreational runners fall between 5 and 7 mph, where both X models work, so the X25's advantage there is its longer, wider deck and higher user limit rather than speed.
The KS Fit app on the X25
TreadmillReviews.com describes the free KS Fit app as working like a remote over Bluetooth, with guided workouts and leaderboards. The same review notes that the app's guided workouts do not change the treadmill's speed for you, so you still adjust by hand. Connect the Watts reported that the app syncs data and lets you build custom workouts. KingSmith lists Apple Watch support through the app.
What stands out
- Speed and capacity in a fold-away frame. Most treadmills that reach 10 mph and carry 300 lb are large folding machines that stand upright in a room. The X25 folds flat to 10.1 inches.
- Wider running area. KingSmith lists 19.6 inches of width, about 1.5 inches more than the X21. Walmart's listing calls it a 19.7-inch ultra-wide surface.
- Smoother deck than the X21. Sydney Kaiser, who has reviewed both models, reported minimal vibration at the fold seam and a more responsive speed dial on the X25 than on its predecessor.
- Fully assembled. Both maker sites list it as arriving assembled.
- Quiet motor. Treadmill Review Guru, TreadmillReviews.com, Connect the Watts and Torokhtiy all described it as quiet. Our guide to walking pad noise explains how flooring changes this.
- Console. Independent reviewers describe a screen in the crossbar showing time, speed, distance, calories and steps, with the SpeedDial knob for speed and power.
Pros
- 10 mph top speed
- 300 lb user limit
- 19.6-inch-wide running area
- Folds to 10.1 inches thick
- Arrives assembled
Cons
- No incline
- No side rails on the standard version
- 104 lb to move
- Deck is short for long-stride runners
- Maker sites list two different motor ratings
Drawbacks
- No incline. None of the sources list an incline, and every independent reviewer flagged it. For hill work, see walking pads with incline or a full treadmill.
- Balance support is limited. Treadmill Review Guru noted the lack of handrails and a handlebar that does not adjust for height. TreadmillReviews.com advised against putting your full weight on the uprights or the console crossbar.
- Stride room for tall runners. Treadmill Review Guru said the 52-inch deck limits long-stride runners. Connect the Watts flagged users over 6 feet 2 inches, and Torokhtiy advised caution for taller runners.
- Motor for daily training. TreadmillReviews.com judged the 1.5 HP rating too low for daily endurance training, and Connect the Watts found speed changes too slow for hard interval work.
- Heavy and hard to roll on carpet. At 104 lb, it is 23 lb heavier than the X21. Treadmill Review Guru said the small wheels struggle on thick carpet.
- Thin cushioning and a visible seam. Treadmill Review Guru called the cushioning minimal, and TreadmillReviews.com could see the fold seam underfoot.
Where the numbers disagree
We compared KingSmith.com, WalkingPad.com, Abt, Walmart, an Amazon listing title and four independent reviews. The X25 has more conflicting figures than most models:
- Motor. KingSmith.com, Abt, Treadmill Review Guru and TreadmillReviews.com say 1.5 HP. WalkingPad.com says 4.5 HP. Connect the Watts and Torokhtiy list 1125 W. Neither maker page says whether its figure is continuous or peak.
- Running area. The maker lists 51.9 by 19.6 inches, Abt 52 by 20, and Treadmill Review Guru and TreadmillReviews.com 19.5 by 52. Connect the Watts and Torokhtiy list a much smaller 47.24 by 17.32 inches. We use the maker figure, but if length matters, ask the seller to confirm.
- Weight. KingSmith lists 104 lb net and 119 lb gross. Connect the Watts gives 119 lb, which matches the shipping weight.
- Display. KingSmith.com says LED, and Abt says a four-window LED display. Treadmill Review Guru, TreadmillReviews.com and Connect the Watts describe an OLED screen.
- Frame and fold. Abt says steel frame; Connect the Watts says aluminum. Walmart's listing calls the fold "tri-fold", while KingSmith calls it double-fold.
- Top speed. The X25 product pages say 10 mph, but the WalkingPad.com FAQ says X Series models reach 11.5 mph.
- Amazon. The Amazon listing we found appeared in search results under two titles, "WALKINGPAD X25 Folding Treadmills" and "WalkingPad X Series Folding Treadmill", so it may group several X models. Check the selected model before ordering.
Who should skip it
Skip the X25 if you want a desk walker: a flat pad from our best under-desk treadmills guide suits that job. Skip it if you need incline, if you are a tall runner planning long daily runs, or if you have to carry the machine up stairs often. Runners who have the floor space for a machine that stays out will get a longer deck, incline and stronger motor from a conventional folding treadmill.
How it compares
WalkingPad X21. The X21 is smaller and lighter: 81 lb, 7.5 mph, 240 lb limit and a 47.6 by 18.1 inch belt, folding to 8.8 inches. It is the easier machine to store and lift. The X25 adds 2.5 mph of top speed, 60 lb of user capacity and about 4 inches of running length.
WalkingPad Denise Austin 2.0. The Denise Austin 2.0 has foldable side rails but tops out at 7.5 mph and 240 lb on a 47 by 17 inch running area. For side rails with the X25's capacity, the X25+ is the closer match.
Horizon 7.0 AT. If you have room for a full folding treadmill, Horizon lists the 7.0 AT with a 20 by 60 inch deck, 0.5 to 12 mph, 0 to 15% incline and a 325 lb limit. It weighs 277 lb and folds upright to 44 by 35 by 68 inches, so it never leaves the room the way the X25 can. Our best treadmills for walking guide covers it.
Scroll sideways for all specs →
| Product | Speed | Incline | Max user | Belt | Weight | Folds | Where to buy |
|---|---|---|---|---|---|---|---|
1 WalkingPad X25Most speed and capacity | 1 to 10 mph | None | 300 lb | 51.9 x 19.6 | 104 lb | ✓ Yesdouble fold | Check price on Amazon |
2 WalkingPad X21Lighter, smaller fold | 1 to 7.5 mph | None | 240 lb | 47.6 x 18.1 | 81 lb | ✓ Yesdouble fold | Check price on Amazon |
3 Horizon 7.0 ATFull treadmill with incline | 0.5-12 mph | 0-15% motorized | 325 lb | 60 x 20 | 277 lb | ✓ Yesone-step hydraulic fold | Check price on Amazon |
Figures are as published by the maker unless the product section below says otherwise. Hover or tap a cell for the full note. We link to the live price instead of printing one, because prices change daily.
For running on smaller machines, see our best walking pads for running.
Setup, maintenance and warranty
Setup. The X25 arrives assembled. Two people should unbox it because of its 119 lb shipping weight. Unfold the deck, raise the console until it locks, fit the safety key and pair the KS Fit app over Bluetooth if you want to log runs or link an Apple Watch.
Maintenance. Running at higher speeds wears a belt faster than walking, so keep to the lubrication schedule in the manual; our lubrication guide explains the method. Check the fold lock and hinge regularly, and see our guide on belt slipping if the belt hesitates under load.
Warranty. WalkingPad.com lists a one-year warranty with an optional extension. Abt describes it as a one-year limited warranty on parts, frame, motor and deck. The WalkingPad FAQ says the one-year limited warranty applies to purchases made directly from WalkingPad.com, so check the terms if you buy elsewhere. WalkingPad.com lists a 30-day return policy.
Safety and recalls
No CPSC recall for KingSmith WalkingPad treadmills, the X25 included, was listed when we checked on 28 September 2026. The CPSC treadmill recall records we searched covered Peloton, Nautilus, Johnson Health Tech and older brands, with no KingSmith or WalkingPad listing. At 10 mph, a fall is more serious than on a walking pad, so always clip on the safety key and leave clear floor space behind the deck.
How we researched this review
We compiled this review on 28 September 2026, following our research method. Sources:
- KingSmith.com X25 page; WalkingPad.com X25 page, X25+ page and FAQ.
- Retailer listings: Abt and Walmart, plus Amazon listing titles seen in search results.
- Independent reviews: Treadmill Review Guru (Sydney Kaiser), TreadmillReviews.com, Connect the Watts (Colin Jenkins) and Torokhtiy (Jacek Szymanowski).
- Horizon Fitness 7.0 AT page for the comparison.
- CPSC recall data for treadmills.