Independent research. Specs checked against maker manuals and live listings.We may earn a commission from qualifying purchases.

WalkingPad X21 vs WalkingPad Z3 Just Walk

Pick the WalkingPad X21 for a wider belt (18.1 in vs 15.7 in) and a higher top speed (7.5 mph vs 4 mph); pick the WalkingPad Z3 Just Walk for less weight to move (67.2 lb vs 81 lb) and a remote.

Specs checked October 30, 2026 · Built from published specs, not our own testing

Quick answer

Pick the WalkingPad X21 for a wider belt (18.1 in vs 15.7 in) and a higher top speed (7.5 mph vs 4 mph); pick the WalkingPad Z3 Just Walk for less weight to move (67.2 lb vs 81 lb) and a remote.

Specs side by side

Scroll sideways for all specs →

ProductMax userBeltWeightSpeedInclineFoldsRemoteAppSizeWarrantyWhere to buy
1
WalkingPad X21Premium tier
240 lb47.6 x 18.181 lb1 to 7.5 mphNone✓ Yesdouble fold✕ NoNoYes, KS Fit55.8 x 27.9 x 41.4 in; folded 39.6 x 27.9 x 8.8 in1 year, optional extension
2
WalkingPad Z3 Just WalkMid-range tier
242 lb47.6 x 15.767.2 lb net1-4 mphNone✓ Yesfolds in half✓ YesYes, KS Fit57.9 x 23.7 x 6.2 in1 year, optional extension

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.

Who should pick which

Pick the WalkingPad X21 if

  • you drift sideways while you read or type. A 18.1-inch belt gives more room than 15.7 inches.
  • you also want to jog or run. It reaches 7.5 mph against 4 mph.
  • you want something to hold for balance, for example at faster speeds or on incline.

Pick the WalkingPad Z3 Just Walk if

  • you will move it in and out of storage often. It weighs 67.2 lb against 81 lb.
  • you want to change speed without bending down to a console.
  • budget matters most. It sits in the mid-range tier.

Fit check

ModelUser weight (with 30 lb headroom)Height, slow desk paceHeight, with room to driftHeight, brisk walking
WalkingPad X21up to about 210 lbup to about 7'2"up to about 6'0"up to about 5'5"
WalkingPad Z3 Just Walkup to about 212 lbup to about 7'2"up to about 6'0"up to about 5'5"

Height fit uses our belt rule: a walking step of 0.41 times your height (0.45 when brisk), plus 12 inches for your shoe, plus 6 inches of room to drift where noted. It is a rough guide, not a measurement of you.

WalkingPad X21

Most compact folding jogging treadmillWalkingPad X21 Double-Fold Treadmill
Max user 240 lbBelt 47.6 x 18.1Incline NoneFolds Yes, double fold
Read our full review →

WalkingPad Z3 Just Walk

Walk-only fold-in-half pad for a standing deskWalkingPad Z3 Just Walk Foldable Treadmill
Max user 242 lbBelt 47.6 x 15.7Incline NoneFolds Yes, folds in half
Read our full review →
Mid-range tierCheck price on Amazon

Related comparisons

Full specs: WalkingPad X21, WalkingPad Z3 Just Walk.

Our buying guides

How these pages are built

Every figure comes from the maker's product page, manual or the Amazon listing, and we only include models with a live, in-stock Amazon listing we checked ourselves. When sources disagree on a weight limit we use the lowest number. We do not test these machines ourselves.

Height fit starts from a typical walking step of 0.41 times your height (0.45 when walking briskly), adds 12 inches for your shoe, and 6 more inches of room to drift for a comfortable fit. These are rough guides, not measurements of you. Weight fit leaves 30 lb of headroom above your body weight.

How we research

Questions

Which holds more weight, the WalkingPad X21 and WalkingPad Z3 Just Walk?

The WalkingPad Z3 Just Walk, rated 242 lb, against 240 lb for the WalkingPad X21.

Which is better for tall people?

The WalkingPad X21 has the longest belt at 47.6 inches, which suits walkers up to about 7'2" at slow desk pace (6'0" with 6 inches of room to drift), and up to about 5'5" for brisk walking, by our belt rule.

Which is lighter to move?

The WalkingPad Z3 Just Walk at 67.2 lb.