WalkingPad Z1 Folding Under-Desk Treadmill
A 180° folding under-desk treadmill that slides under a bed or sofa when you're done — the apartment-friendly upgrade to the P1.
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What we like
- 180° fold collapses to roughly 4 inches thick — actually fits under a bed or couch
- Brushless 2.25HP motor stays under 45dB, quiet enough for calls
- Ships fully assembled, ready to walk in under five minutes
- Remote control and LED readout for speed, time, distance, calories
- 23kg unit weight is manageable for one person to move room to room
Could be better
- 1-4 MPH ceiling means walking only — no jogging or running
- No handrails, so it's not a fit for anyone needing balance support
- Belt is narrower than full-size treadmills; longer strides feel cramped
Full Review
The WalkingPad Z1 is what happens when KingSmith stops trying to make under-desk treadmills smaller and starts making them flatter. The 180° hinge folds the deck in half, dropping the footprint to something that genuinely slides under a sofa or bed. If you live in an apartment and don’t have a permanent home for a treadmill, this is the headline feature — everything else is in service of it.
Build and Fold Mechanism
The hinge is the whole pitch, and it works. Folded, the Z1 is roughly four inches thick and easy to push against a wall or under furniture. The deck itself is sturdy aluminum with a four-layer belt that has noticeably more give than the older P1. At 23kg it’s heavy enough to feel planted but light enough that one person can drag it across a rug without fighting it.
Motor and Walking Experience
The 2.25HP brushless motor tops out at 4 MPH, which is a brisk walk and nothing more. KingSmith is honest about this — the Z1 is a walking pad, not a jogging treadmill. Inside that envelope it’s smooth, with consistent speed under load and almost no audible motor whine. Calls and meetings while walking are realistic; I measured low-40s dB at 2 MPH on a hardwood floor.
Compared to the WalkingPad P1
The P1 is still cheaper and still a fine choice if storage isn’t an issue. The Z1 trades a bit of top speed (4 MPH vs the P1’s 3.72) for a meaningfully better fold and a quieter motor. If you have a closet to stand a P1 up in, save the money. If your treadmill has to disappear into the room when you’re not using it, the Z1 earns the premium.
Who Should Buy This
Apartment dwellers, anyone working from a small home office, and people who’d otherwise skip a treadmill because there’s nowhere to put it. If you want to jog, run, or use handrails, look at a folding upright treadmill instead — the Z1 is purpose-built for walking meetings and standing-desk pairing, and it’s the best version of that idea KingSmith has shipped.
