Sunny SF-X7110 vs WalkingPad C2: Specs Compared

Quick answer

Pick the Sunny SF-X7110 Smart Ultra Curved Manual Treadmill for a higher weight limit (330 lb vs 220 lb) and a longer belt (59 in vs 47.2 in); pick the WalkingPad C2 for less weight to move (55 lb vs 157 lb) and folding in half.

Specs side by side

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Product	Max user	Belt	Weight	Speed	Incline	Folds	Remote	App	Size	Warranty	Where to buy
1 Sunny SF-X7110 Smart Ultra Curved Manual TreadmillPremium tier	330 lb	59 x 17.7	157 lb	User-driven	None	✕ No	✕ No	SunnyFit	67.7 x 29.9 x 59.05 in; step-up 11.4 in min / 16.5 in max	3-year structural frame	Check price on Amazon
2 WalkingPad C2Mid-range tier	220 lb	47.2 x 15.8	55 lb	0.5-3.7 mph	None	✓ Yesfolds in half	✓ Yes	KS Fit	57 x 20 x 5 in unfolded; 32 x 20 x 5.5 in folded	Not published	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.

Who should pick which

Pick the Sunny SF-X7110 Smart Ultra Curved Manual Treadmill if

you weigh more than about 190 lb. It is rated for 330 lb against 220 lb, and we suggest 30 lb of headroom above your weight.
you are tall or walk briskly. Its 59-inch belt suits walkers up to about 9'6" at slow desk pace (8'4" with 6 inches of room to drift), and up to about 7'7" for brisk walking, against 7'1" at slow desk pace on the 47.2-inch belt.
you drift sideways while you read or type. A 17.7-inch belt gives more room than 15.8 inches.
you want something to hold for balance, for example at faster speeds or on incline.

Pick the WalkingPad C2 if

you will move it in and out of storage often. It weighs 55 lb against 157 lb.
storage space is tight. It folds (yes, folds in half (180 degrees)); the other one does not fold its deck.
you want to change speed without bending down to a console.
budget matters most. It sits in the mid-range tier.

Fit check

Model	User weight (with 30 lb headroom)	Height, slow desk pace	Height, with room to drift	Height, brisk walking
Sunny SF-X7110 Smart Ultra Curved Manual Treadmill	up to about 300 lb	up to about 9'6"	up to about 8'4"	up to about 7'7"
WalkingPad C2	up to about 190 lb	up to about 7'1"	up to about 5'11"	up to about 5'4"

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.

Sunny SF-X7110 Smart Ultra Curved Manual Treadmill

Curved trainer for walking and runningSunny Health & Fitness Smart Ultra Manual Treadmill, Curved, Non-Motorized, 8 Levels of Magnetic Resistance - SF-X7110

Max user 330 lbBelt 59 x 17.7Incline noneFolds no

Premium tierCheck price on Amazon

WalkingPad C2

Small apartments that need a fold-in-half padWalkingPad C2 Foldable Walking Pad

Max user 220 lbBelt 47.2 x 15.8Incline noneFolds yes, folds in half

Read our full review →

Mid-range tierCheck price on Amazon

What owners report: WalkingPad C2

Our summary, in our own words, of 20 verified-purchase Amazon reviews we read on 30 October 2026 (the listing then showed 83 positive and 19 critical verified reviews). This is not our own testing.

What they like

Folds in half and stows under a desk
Owners use it for hours at a standing desk; one reports 1,000 miles
KingSmith support gets praise

Common complaints

3 of the 10 critical reviews we read say it is louder than expected, with noise at the fold joint
Several dislike needing the app to unlock features, and some raise data and privacy concerns
A few report a sticking or dead remote and an unreliable automatic speed mode

Related comparisons

Full specs: Sunny SF-X7110 Smart Ultra Curved Manual Treadmill, WalkingPad C2.

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 Sunny SF-X7110 Smart Ultra Curved Manual Treadmill and WalkingPad C2?

The Sunny SF-X7110 Smart Ultra Curved Manual Treadmill, rated 330 lb, against 220 lb for the WalkingPad C2.

Which is better for tall people?

The Sunny SF-X7110 Smart Ultra Curved Manual Treadmill has the longest belt at 59 inches, which suits walkers up to about 9'6" at slow desk pace (8'4" with 6 inches of room to drift), and up to about 7'7" for brisk walking, by our belt rule.

Which is lighter to move?

The WalkingPad C2 at 55 lb.