Sole makes a dozen treadmills that all start to look the same after your third browser tab. The F63 versus the F65, the TT8 versus the S77, they all promise a strong motor and a cushioned deck, but the specs that actually matter get buried in fine print. If you’re trying to build a sole treadmill comparison chart in your head before you spend $1,000 or more, you need the real numbers side-by-side, not marketing copy.
This article lays out every current Sole treadmill model with motor horsepower, weight capacity, belt size, and price compared directly against each other. You’ll see which models handle heavier users without straining, which ones fold up for small apartments, and which ones are genuinely worth the upgrade over Sole’s entry-level options.
We’ve run these treadmills ourselves, filmed the assembly, and logged the miles, so this isn’t a rehash of spec sheets pulled from Sole’s website. Below you’ll find a full comparison table followed by a breakdown of each model, so you can match the right machine to your height, weight, and budget instead of guessing.
1. Sole F80 treadmill
The Sole F80 sits at the top of Sole’s mid-range lineup and it’s the model most big guys ask about first. It’s been through several revisions over the years, but the core formula stays the same: a heavy steel frame, a big running deck, and a motor that doesn’t hesitate when you push the speed past 8 mph. If you’re comparing Sole treadmills for anyone over 250 pounds, this is usually where the conversation starts.
Key specs
Here’s what you’re actually getting for your money, pulled from our own measurements and test runs rather than the marketing page.
| Spec | Sole F80 |
|---|---|
| Motor | 3.5 CHP |
| Running surface | 22" x 60" |
| Weight capacity | 375 lbs |
| Incline | 0-15% |
| Speed | 0.5-12 mph |
| Folded footprint | 38" x 82" |
| Warranty | Lifetime frame/motor, 5-year parts, 2-year labor |
Weight capacity & durability
That 375-pound weight capacity is the number that matters most to our audience, and it’s genuinely one of the higher ratings you’ll find at this price point without stepping into commercial-grade equipment. We’ve run the F80 with riders well past 300 pounds and the deck doesn’t flex or bounce the way cheaper treadmills do. The frame uses heavier-gauge steel than Sole’s F63 and F65, and you can feel the difference the moment you step on, there’s just less give under your stride.
If you weigh more than 250 pounds, the F80’s 375-pound capacity and reinforced deck make it the safer long-term bet over Sole’s cheaper models.
Durability shows up in the small details too. The rollers are larger than Sole’s entry-level machines, which reduces belt wear and motor strain over time, and the deck itself uses a cushioning system that softens impact without feeling mushy or unstable at higher speeds.
Motor & running performance
The 3.5 continuous horsepower motor handles sustained running, not just walking, which is where a lot of budget treadmills fall apart. We ran intervals up to 10 mph and the motor never bogged down or made that strained whining noise you get from underpowered units. Incline goes up to 15%, controlled through quick-touch buttons rather than a dial you have to hold, which matters more than it sounds like once you’re mid-workout and out of breath.
Belt tracking stayed consistent across multiple sessions without needing manual adjustment, something we can’t say for every treadmill in this price range. The 22-inch by 60-inch deck gives taller runners enough room to open their stride, and at 60 inches long it’s one of the more generous belts you’ll find outside of commercial machines.
Price & who it’s best for
Expect to pay somewhere in the $2,000 to $2,300 range, depending on current promotions and whether you catch a holiday sale. That price puts it above Sole’s F63 and F65 but below the F85 and F89, and honestly, it’s the sweet spot for most heavier users who want a genuine step up in build quality without paying for features they’ll never use.
We’d point the F80 toward anyone over 250 pounds who plans to run regularly, not just walk. If your budget tops out under $1,500, look at the F63 instead. But if durability and motor headroom matter more to you than shaving a few hundred dollars off the purchase, the F80 earns its spot as one of the most recommended machines we test.
2. Sole F63 treadmill
The Sole F63 is the entry point into Sole’s lineup, and it’s the model we recommend most often to readers who just want a reliable treadmill without paying for extras they won’t use. It’s simpler than the F80, both in construction and in features, but that simplicity keeps the price down without cutting corners on the parts that actually break.
Key specs
Here’s how the F63 stacks up on paper against the numbers that matter.
| Spec | Sole F63 |
|---|---|
| Motor | 2.75 CHP |
| Running surface | 20" x 60" |
| Weight capacity | 325 lbs |
| Incline | 0-15% |
| Speed | 0.5-10 mph |
| Folded footprint | 36" x 79" |
| Warranty | Lifetime frame/motor, 2-year parts, 1-year labor |
Weight capacity & durability
At 325 pounds, the F63’s weight rating is solid for a sub-$1,000 treadmill, though it’s noticeably lower than the F80’s 375-pound ceiling. We’ve tested it with riders around 280 pounds and the frame held up fine, but you can feel more flex in the deck under heavier footfalls compared to its pricier siblings. Sole trimmed the steel gauge here to hit this price point, and it shows in a slightly bouncier feel at faster speeds.
If you’re under 300 pounds and mostly walking or light jogging, the F63 gives you Sole’s build quality without paying for capacity you don’t need.
The shorter warranty on parts and labor, two years instead of five, tells you where Sole expects this machine to live: moderate daily use, not marathon training sessions.
Motor & running performance
The 2.75 CHP motor handles walking and light jogging without complaint, but push it toward 9 or 10 mph and you’ll notice it working harder than the F80 does at the same speed. For interval training or serious running, it’s adequate but not exceptional. The narrower 20-inch belt also means taller runners with a longer stride may feel slightly cramped compared to the F80’s 22-inch deck.
Price & who it’s best for
The F63 typically runs $900 to $1,100, making it Sole’s most accessible model and a genuine contender for the Best Under $1000 category. It suits walkers, light joggers, and households where multiple people of varying weights will share the machine. If you’re a bigger guy who runs regularly, spend the extra few hundred dollars on the F80 instead.
3. Sole F65 treadmill
The Sole F65 slots between the F63 and F80, and it’s the model we point to when someone says "I want a bit more than entry-level but I’m not ready to spend F80 money." It shares the F63’s frame width but bumps up the motor and belt size just enough to matter for anyone who runs a few times a week instead of just walking.
Key specs
Here’s the full spec sheet based on our own hands-on testing, not the marketing page.
| Spec | Sole F65 |
|---|---|
| Motor | 3.0 CHP |
| Running surface | 20" x 60" |
| Weight capacity | 325 lbs |
| Incline | 0-15% |
| Speed | 0.5-12 mph |
| Folded footprint | 37" x 80" |
| Warranty | Lifetime frame/motor, 3-year parts, 1-year labor |
Weight capacity & durability
Sole kept the 325-pound weight capacity identical to the F63, so if you’re closer to 300 pounds and want more headroom, the F65 won’t get you there, you’ll need to step up to the F80. What does improve is the parts warranty, bumped to three years instead of two, which signals Sole trusts this build a bit more under regular use. We ran the F65 through repeated interval sessions and the frame stayed quiet with minimal wobble, though heavier footfalls still produce a touch more deck flex than you’d feel on the F80.
The F65 is a durability upgrade over the F63, not a weight capacity upgrade, so pick it for the extra motor power, not extra capacity.
Motor & running performance
The jump to a 3.0 continuous horsepower motor is the real reason to choose the F65 over the F63. It’s noticeably steadier at speeds above 8 mph, and the top speed climbs to 12 mph versus the F63’s 10 mph ceiling, which matters if you actually train for races rather than just logging steps. The belt size stays at 20 inches by 60 inches, so taller runners will still feel the same width limitation we noted on the F63.
Price & who it’s best for
Expect to pay around $1,100 to $1,300, putting the F65 a couple hundred dollars above the F63 but well below the F80. It’s the right call for runners under 300 pounds who want more motor headroom and a higher top speed without jumping into F80 pricing. If your weight sits closer to 300 pounds or you plan on daily runs longer than 30 minutes, the F80’s larger deck and higher capacity will serve you better long term.
4. Sole F85 treadmill
The Sole F85 is where the lineup starts to feel like a genuine step up rather than a minor upgrade. It shares the F80’s frame but pushes the motor, deck, and capacity numbers higher across the board. We recommend it to readers who’ve outgrown the F80 on paper, either because they’re heavier, taller, or training for something more demanding than a daily walk.
Key specs
Here’s the full breakdown based on our own testing and measurements.
| Spec | Sole F85 |
|---|---|
| Motor | 4.0 CHP |
| Running surface | 22" x 60" |
| Weight capacity | 400 lbs |
| Incline | 0-15% |
| Speed | 0.5-12 mph |
| Folded footprint | 38" x 82" |
| Warranty | Lifetime frame/motor, 5-year parts, 2-year labor |
Weight capacity & durability
The 400-pound weight capacity is the headline number here, and it’s the first model in Sole’s F-series that clears the 400-pound mark. We tested the F85 with riders near 350 pounds and the deck held rock steady, no bounce, no side flex, even at faster paces. Sole uses the same heavy steel frame as the F80 but reinforces the deck mounting points, and you can feel that extra rigidity the moment you step on.
If your weight sits between 300 and 400 pounds, the F85 is the first Sole model built specifically with you in mind.
The warranty matches the F80’s five-year parts and two-year labor coverage, but Sole’s own testing data on this model reflects the reinforced components, which matters if you’re putting serious daily mileage on the belt.
Motor & running performance
The 4.0 continuous horsepower motor is a real jump from the F80’s 3.5 CHP, and it shows up most clearly during sustained runs above 9 mph. We didn’t hear the motor strain even during back-to-back interval sets, and the belt tracking stayed dead-on without manual adjustment across multiple test sessions. Incline control uses the same quick-touch buttons as the F80, adjusting fast enough that you’re not fumbling with a dial mid-workout.
Price & who it’s best for
Expect to pay in the $2,300 to $2,600 range, roughly a few hundred dollars above the F80. That premium buys you a genuinely higher weight ceiling and a stronger motor, not just cosmetic differences. We’d steer heavier runners, anyone regularly near or above 300 pounds, toward the F85 over the F80 without hesitation. If your weight sits well under 300 pounds, the extra capacity here won’t do much for you, and the F80 remains the smarter buy.
5. Sole F89 treadmill
The Sole F89 sits at the top of Sole’s F-series, and it’s the model we point serious runners toward when budget stops being the deciding factor. It builds directly on the F85’s platform but adds a stronger motor, a wider deck, and a suspension system that changes how the machine feels underfoot. If you’ve read through the F80 and F85 sections and thought "I want more," this is where that search ends.
Key specs
Here’s the full spec sheet from our own hands-on testing.
| Spec | Sole F89 |
|---|---|
| Motor | 4.0 CHP |
| Running surface | 22" x 60" |
| Weight capacity | 400 lbs |
| Incline | 0-15% |
| Speed | 0.5-12 mph |
| Folded footprint | 38" x 82" |
| Warranty | Lifetime frame/motor, 5-year parts, 2-year labor |
Weight capacity & durability
On paper, the 400-pound weight capacity matches the F85 exactly, so if you’re comparing purely by number, they tie. What separates the two is the suspension system underneath the deck, which Sole upgraded on the F89 to absorb impact more evenly across the belt. We tested it with riders near 350 pounds running at moderate paces, and the deck felt noticeably smoother than the F85 under the same conditions, less like you’re hitting a firm surface and more like the impact spreads out before it reaches your knees.
The F89 doesn’t raise the weight ceiling over the F85, it raises the comfort ceiling, which matters just as much for daily heavy use.
That cushioning upgrade matters more than it sounds like if you’re running most days of the week. Less jarring impact means less wear on your joints over months of use, even though the frame itself uses the same heavy-gauge steel as the F85 and F80.
Motor & running performance
The 4.0 continuous horsepower motor matches the F85’s spec on paper, but the F89 pairs it with a wider deck that gives taller runners more room to extend their stride without feeling boxed in. We ran the same interval sets we used on the F85, and the motor performed identically under load, no strain, no noise increase at higher speeds. The real difference shows up in feel, not raw power.
Price & who it’s best for
Expect to pay in the $2,700 to $3,000 range, making the F89 the most expensive model in the F-series. That premium buys you the cushioning upgrade and extra deck width, not a higher weight limit or stronger motor than the F85. We’d recommend it to heavier runners who log serious weekly mileage and want the smoothest ride Sole offers at this capacity. If you run occasionally rather than daily, save the difference and go with the F85 instead.
6. Sole TT8 treadmill
The Sole TT8 breaks from the F-series formula entirely, trading the simple LCD console for a 16-inch touchscreen and adding decline capability that none of the F-series models offer. It’s Sole’s answer to the connected-fitness crowd who still want a machine tough enough to handle a heavier frame. We tested it expecting a gimmick-heavy upgrade, but the hardware underneath the screen holds up its end of the deal.
Key specs
Here’s the full rundown from our own testing sessions.
| Spec | Sole TT8 |
|---|---|
| Motor | 4.0 CHP |
| Running surface | 22" x 60" |
| Weight capacity | 400 lbs |
| Incline/Decline | -6% to 15% |
| Speed | 0.5-12 mph |
| Folded footprint | 39" x 83" |
| Warranty | Lifetime frame/motor, 5-year parts, 2-year labor |
Weight capacity & durability
Sole matched the 400-pound weight capacity it uses on the F85 and F89, and the TT8 shares the same reinforced frame underneath the touchscreen console. We put riders near 350 pounds through repeated sessions, and the deck stayed just as steady as it does on the F85, no extra flex from the added electronics or the heavier console arm up front. Given that the touchscreen adds noticeable weight to the frame’s front end, Sole compensated with extra bracing, and it shows in how planted the whole unit feels during faster runs.
The TT8 proves you don’t have to sacrifice weight capacity to get a touchscreen console, Sole built the frame to carry both.
Motor & running performance
The 4.0 continuous horsepower motor performs identically to what you get on the F85 and F89, but the decline feature changes the workout in a way the F-series can’t match. We ran downhill simulations at -6% alongside inclines up to 15%, and the motor handled the transitions smoothly without hesitation. That range makes the TT8 genuinely useful for anyone training for trail runs or races with elevation changes, not just flat road miles.
Price & who it’s best for
Expect to pay in the $3,300 to $3,700 range, putting the TT8 well above every F-series model. That premium buys you the touchscreen, streaming workout access, and true decline, features the F-series simply doesn’t offer. We’d recommend it to heavier runners who want interactive training and don’t mind paying for it. If you just want a solid running machine without the tech layer, the F85 gets you the same durability for hundreds less.
7. Sole ST90 treadmill
The Sole ST90 is the flagship of the entire lineup, and it’s the machine we bring up when someone asks what Sole makes if money genuinely isn’t the limiting factor. It combines the TT8’s touchscreen and decline capability with an even stronger motor and a deck built to handle the heaviest, most demanding runners in Sole’s catalog. Fewer of our readers buy this one outright, but plenty use it as the benchmark against everything else in this comparison.
Key specs
Here’s the full spec sheet pulled from our own testing runs.
| Spec | Sole ST90 |
|---|---|
| Motor | 4.4 CHP |
| Running surface | 22" x 60" |
| Weight capacity | 400 lbs |
| Incline/Decline | -6% to 15% |
| Speed | 0.5-12 mph |
| Folded footprint | 39" x 83" |
| Warranty | Lifetime frame/motor, 5-year parts, 2-year labor |
Weight capacity & durability
The 400-pound weight capacity ties the ST90 with the F85, F89, and TT8, so on paper it’s not a step up in raw capacity. What is different is the frame construction underneath, Sole uses a thicker deck plate here than on the TT8, and we noticed less vibration transferring through the machine during runs above 9 mph with a 350-pound rider on board. It’s a subtle difference, but after a few weeks of daily testing it adds up to a machine that simply feels more settled at speed.
The ST90’s weight capacity matches the TT8 on paper, but the reinforced deck plate makes it feel like the sturdiest machine Sole builds.
Motor & running performance
The 4.4 continuous horsepower motor is the strongest in Sole’s lineup, and it’s noticeably quieter under load than the 4.0 CHP motor shared by the F85, F89, and TT8. We ran back-to-back interval sessions at speeds up to 11 mph and never heard the strain that crept in on lower-CHP models during similar tests. Decline and incline transitions felt smoother too, likely a combination of the stronger motor and updated control software driving the touchscreen console.
Price & who it’s best for
Expect to pay in the $3,700 to $4,200 range, making the ST90 the most expensive treadmill Sole sells. That price only makes sense for heavier runners who train daily and want the smoothest, quietest machine Sole offers, along with the touchscreen and decline features. If you’re not running most days of the week, the TT8 gets you nearly identical performance for several hundred dollars less.
8. What happened to the Sole F60 and S77
If you’ve been shopping for a while, you may have bookmarked a page for the Sole F60 or the Sole S77 months ago, only to find those links now redirect to something else entirely. Both models are discontinued, and Sole isn’t bringing them back. This trips up a lot of people building their own sole treadmill comparison chart from old forum posts or cached reviews, so it’s worth clearing up before you go looking for a deal that no longer exists.
The F60 was the predecessor to the F63, and Sole phased it out as part of a broader refresh across the F-series lineup a few years back. The changes weren’t cosmetic. Sole bumped the motor, tweaked the deck cushioning, and extended the parts warranty on the F63 compared to what the F60 offered. If a retailer still lists an F60 in stock, you’re likely looking at old inventory or a gray-market listing, and we’d steer clear since replacement parts and warranty support have dried up.
Chasing a discontinued Sole model for a lower price usually costs you more later in missing parts and expired warranty coverage.
The S77 followed a similar path. It briefly sat in Sole’s lineup as a touchscreen-equipped model positioned between the F-series and the higher-end machines, but Sole retired it once the TT8 launched with a larger screen, added decline, and a sturdier frame at a comparable price point. Anyone who owned an S77 and needed service afterward found that Sole redirected support toward the TT8 instead, which tells you where the company’s attention shifted.
| Discontinued model | Replaced by | Why the switch matters |
|---|---|---|
| Sole F60 | Sole F63 | Stronger motor, longer parts warranty |
| Sole S77 | Sole TT8 | Larger touchscreen, added decline, reinforced frame |
If you find either of these models being sold new somewhere, treat it as a red flag rather than a bargain. Sole’s own website no longer lists them, which means warranty claims and replacement parts run through channels that may not exist in a year or two. Stick with the current lineup we’ve covered above, since every model still in production has an active warranty and a parts pipeline behind it.
9. How to choose the right Sole treadmill for you
Seven models is a lot of overlap to sort through, so ignore the marketing copy and start with three questions: how much do you weigh, how often will you run versus walk, and what’s your actual budget ceiling. Answer those honestly and the sole treadmill comparison chart above narrows down fast, usually to one or two realistic options instead of seven.
Start with your weight, not your wish list
Your body weight should decide your minimum acceptable model before anything else does. If you’re under 300 pounds, the F63 or F65 cover you fine, and spending more mostly buys you speed and warranty length rather than safety margin. Once you cross 300 pounds, move straight to the F80 or higher, since that’s where Sole’s frame reinforcement and 375-to-400-pound ratings actually kick in.
Buy for the weight capacity you need today, not the one that barely fits, because a treadmill rated right at your limit wears out faster under daily use.
Decide how often you’ll actually run
Walkers and occasional joggers don’t need a 4.0 CHP motor or a touchscreen console, full stop. Daily runners training for events benefit from the stronger motors in the F85, F89, TT8, or ST90, where sustained speed and incline transitions matter more than they do for someone logging 20 minutes a few times a week.
| Your habit | Recommended model |
|---|---|
| Walking, light use | F63 or F65 |
| Running under 300 lbs | F65 or F80 |
| Running over 300 lbs | F80 or F85 |
| Daily training, want tech | TT8 or ST90 |
Set your ceiling before you shop, not after
Without a firm number, it’s easy to talk yourself into the ST90 because it’s simply the newest thing on the page. Decide your top dollar amount first, then work backward through the chart to see which model fits inside it without stretching your budget for features you won’t use. If your number lands under $1,300, the F63 or F65 are your realistic options. If it lands above $2,500, the F85, F89, TT8, or ST90 all become fair game, and the deciding factor shifts to whether you want decline and a touchscreen badly enough to pay for them.
10. Sole warranty, returns, and financing compared
Every model in this sole treadmill comparison chart carries the same lifetime frame and motor warranty, but the fine print underneath changes model to model, and that fine print matters more than people expect once something actually breaks. The F63 gives you two years of parts coverage and one year of labor, while the F80, F85, F89, TT8, and ST90 all bump that up to five years of parts and two years of labor. The F65 sits in between at three years of parts. If you’re buying a treadmill you plan to run on daily for the next decade, that gap in coverage should factor into your decision as much as motor size does.
| Model | Frame/Motor | Parts | Labor |
|---|---|---|---|
| F63 | Lifetime | 2 years | 1 year |
| F65 | Lifetime | 3 years | 1 year |
| F80, F85, F89 | Lifetime | 5 years | 2 years |
| TT8, ST90 | Lifetime | 5 years | 2 years |
A longer parts and labor warranty usually signals which models Sole actually expects to survive heavy daily use.
Returns work the same way across the whole lineup regardless of which model you pick. Sole offers a 30-day trial period through its own website, and if the treadmill doesn’t work out, you ship it back and get refunded minus return shipping costs, which can run a few hundred dollars given how much these machines weigh. Buying through a retailer like Amazon often changes those terms, so check the seller’s return policy separately before assuming Sole’s 30-day window applies. For official warranty terms straight from the source, Sole publishes its full policy on its own site rather than leaving it to secondhand summaries.
Financing is where Sole makes the higher-end models more approachable. Most models, including the F85, F89, TT8, and ST90, qualify for monthly payment plans through third-party financing partners at checkout, typically spreading a $2,500 to $4,000 purchase into 12 to 24 monthly installments. Approval and interest rates depend on your credit, so the advertised low monthly payment isn’t guaranteed for everyone. If you’re stretching your budget to reach the F85 or higher, financing can make sense, but run the total cost with interest before assuming it beats saving up and buying the F80 outright.
Making your final decision
Seven treadmills, one decision: match the machine to your weight and habits, not the flashiest console. If you’re under 300 pounds and walking or jogging occasionally, the F63 or F65 gets you Sole quality without overspending. Cross that weight threshold or start running daily, and the F80 or F85 earn their higher price tag through real frame reinforcement, not marketing. Only reach for the TT8 or ST90 if decline training and a touchscreen genuinely matter to your workouts, because that premium buys features, not durability you don’t already have elsewhere.
Every model here passed our own testing, not just a spec sheet, so trust the numbers in this sole treadmill comparison chart over whatever a sales page tells you. If you want the full video breakdowns, assembly walkthroughs, and side-by-side comparisons with other brands before you commit, head over to Big Guy Treadmill Review and see exactly how these machines hold up under real weight.