Buying a Used ProShox2 Treadmill in 2026: What to Check, Which Model, and What to Pay

A ProShox2 treadmill isn't actually a model. "ProShox" is ProForm's name for its deck cushioning, and the ProShox 2 badge shows up on the deck of several ProForm folding treadmills. That's why one used ProShox2 treadmill can have a 55-inch belt and a 10 mph top speed while another has a 60-inch belt and 12 mph. Used ProForm treadmills on Commonplace have a median asking price near $975, so knowing which machine you're actually looking at is worth real money.

I help people buy and sell treadmills for a living, and ProForm is one of the brands I see most. Sellers list them by whatever word is biggest on the deck, which is often "ProShox." This guide shows you how to find the real model, what to check before you pay, the problems that actually show up on these machines, and what a fair used price looks like next to new.

What Is a ProShox2 Treadmill, Really?

A ProShox2 treadmill is a ProForm treadmill that uses the ProShox 2 version of ProForm's cushioning system. The cushioning is a feature, not the product.

ProForm puts ProShox cushioning on a long list of machines. Retailer listings name it on the 205 CST, the 505 CST, the Pro 2000, the Power 545i and 795i, the Carbon TLX and the Cadence LT, among others. Retailers describe it as a system that absorbs impact to ease the strain on your feet, ankles, knees and hips.

So when you search "proshox2 treadmill," you're really searching for one of several machines. Some are entry-level folders. Some are the bigger Pro-series machines with a stronger motor and a longer belt. The two ProShox2 listings that came through Commonplace this year were both 2018 ProForm Pro-series machines, one of them a folding model, each with the ProShox badge on the deck.

Here's the part that matters to your wallet. The cushioning feels about the same across the line. The motor, belt length, incline range and frame don't. That's where the price difference lives.

How to Find Which ProShox2 Model You're Buying

The model number is the only reliable way to identify a used ProShox2 treadmill. Look for a code that starts with PETL or PFTL on the decal on the frame, usually near the front by the power cord, or in the owner's manual.

Ask the seller for a photo of that decal before you do anything else. ProForm model numbers look like PETL78719 (a 505 CST) or PETL17818 (a Pro 2000). Search that code and you'll find the real spec sheet, the original price and the manual. Without it, you're guessing.

If the seller can't find the decal, the console tells you a lot. Pro-series machines have a bigger console with more buttons and a tablet holder up top. The entry-level CST machines have a simpler console and a shorter deck.

What you see	Entry-level ProShox folder (e.g. 505 CST)	Pro-series ProShox 2 (e.g. Pro 2000)
Running belt (as listed)	20" x 55"	20" x 60"
Top speed (as listed)	10 mph	12 mph
Incline (as listed)	Lower range	Up to 12%
Best for	Walking, light jogging	Running, taller users, steady incline work
What it means used	Cheaper, fine for walking	Worth paying more for if you run

Specs vary by model year, so treat this table as a guide and confirm the numbers against the model's own manual. One rule I'd hold firm on: if you run, or you're over six feet tall, get the 60-inch belt. A 55-inch belt feels short once you're at a running stride.

What to Inspect on a Used ProShox2 Treadmill

On a used ProShox2 treadmill, check the belt and deck first, then the motor under load, then the incline and the fold. Those four tell you almost everything.

1. Belt and deck. Lift the edge of the belt and run your hand along the deck under it. It should feel smooth and slightly waxy. A dry, rough deck or a belt worn shiny in the middle means more friction, which wears the motor and the control board.
2. Belt tracking. Run it at 3 mph with nobody on it. The belt should stay centered. If it drifts to one side, it needs adjustment, which is easy. If it slips or hesitates when you step on, the belt or the drive belt underneath is worn.
3. Motor under load. Walk at 3 mph, then jog at 6. Listen for a steady hum. Surging, a burning smell, or the speed dropping each time your foot lands are signs of a tired motor or control board.
4. Incline. Run it from flat to the top and back. It should move smoothly and reach every level. A stuck incline usually means the incline motor needs calibration or replacement.
5. The fold (on folding models). Fold it up and let it down. The gas shock should lower the deck slowly. If the deck drops hard, the shock is worn out. Cheap to fix, but a real safety issue.
6. Console and safety key. Every button should respond, and the machine should stop the moment the safety key is pulled. A missing key is easy to replace. A dead button panel isn't.

You don't have to run this test alone on Commonplace. Our drivers inspect the treadmill at pickup and send you photos and a video before it leaves the seller's house. You pay only after it passes inspection. Here's how it works if you're new to it.

Common ProShox2 Treadmill Problems and Red Flags

The most common problems on a used ProShox2 treadmill are a worn belt and deck, a failing motor control board, and a stuck incline. None of them are unique to ProForm. All of them show up on folding treadmills that ran for years without maintenance.

Here's what I'd treat as a red flag:

• "Works great, just needs a new belt." Sometimes true. Often the belt wore out because the deck was never lubricated, and the motor paid for it. Price it as a belt plus a possible board.
• Error codes on the console. Ask the seller to power it on in a video. A code at startup is worth looking up before you agree to anything.
• A treadmill stored in a garage or a damp basement. Rust on the rollers and frame bolts, plus electronics that hate humidity.
• No model decal. Not a dealbreaker, but it means you can't check the spec or order the right parts later. Negotiate for it.

One more thing on iFit. Many ProForm treadmills are built around iFit, ProForm's training subscription. A used ProShox2 treadmill still works manually without it. You set the speed and incline yourself. If you want the trainer-led classes, budget for the membership on top of the purchase price. Our used ProForm treadmill guide goes deeper on iFit and which models are worth it.

What a Used ProShox2 Treadmill Is Worth

A used ProShox2 treadmill should cost a fraction of new, and the right number depends on which model sits under the badge. On Commonplace, the middle of the market for used ProForm treadmills runs from about $740 to $1,540 in asking price, with a median near $975, delivered.

The 2018 ProShox2 machines we've had listed were asking $825 to $875. That's in line with the market for a six- or seven-year-old Pro-series machine in excellent condition. For an entry-level CST folder of the same age, I'd want to pay noticeably less, because the new price was lower to begin with.

Here's how I'd adjust from the median:

1. Pay toward the top for a Pro-series model with a 60-inch belt, a clean deck, a working incline and a model decal.
2. Pay toward the middle for an entry-level folder in good working order.
3. Knock off the cost of the fix for a worn belt, a weak gas shock or a missing safety key.
4. Walk away from a machine with a surging motor or startup error codes unless it's priced as a parts machine.

For a broader look at how treadmill prices fall over time, our guide to what a used treadmill is worth walks through age, brand and condition.

Should You Buy a Used ProShox2 Treadmill?

Yes, a used ProShox2 treadmill is a good buy if it's a Pro-series model in working order at a fair price. ProForm machines are common, parts are easy to find, and the cushioning is easy on your joints.

Where I'd hesitate is the entry-level folders sold at Pro-series prices. That's the most common mismatch I see, and it happens because the deck says ProShox either way. Get the model number, check the belt length, and price it like the machine it actually is.

If space is tight, compare it against the options in our guide to the best folding treadmill for small spaces. And if you're looking at ProForm's top-end machines, our used ProForm Pro 9000 guide covers the next step up.

ProShox2 Treadmill FAQ

Is ProShox2 a ProForm treadmill model?

No. ProShox 2 is the cushioning system printed on the deck. The model is the PETL or PFTL number on the frame decal, such as a Pro 2000 or a 505 CST.

Does ProShox cushioning actually help?

It softens each footstrike compared with a hard, uncushioned deck, which is the point of it. It won't make a short, underpowered treadmill feel like a commercial one. The motor and belt length matter more for how a machine runs.

Can I use a used ProShox2 treadmill without iFit?

Usually yes. You can set the speed and incline by hand. iFit only adds the trainer-led workouts and the automatic control. Check the model's manual if you're not sure how it starts up without an account.

How much should I pay for a used ProShox2 treadmill?

Most good ones fall between about $740 and $1,540 asking on Commonplace, with a median near $975, delivered. Pro-series models with a 60-inch belt sit at the top. Entry-level folders belong lower.

How do I move a folding ProShox2 treadmill?

Fold and lock the deck, unplug it and roll it on its front wheels. It's still a heavy machine, so stairs need two strong people or a delivery crew. On Commonplace, our drivers handle the pickup, stairs and delivery.

Selling a ProForm, ProShox or any other treadmill? You can sell your treadmill on Commonplace. We pick it up, inspect it and deliver it to the buyer, so you never have to deal with buyers yourself. Our guide on how to sell a treadmill covers pricing.

Buying? Browse inspected used treadmills for sale. Every one is checked at pickup, and you pay only after it passes inspection.