SB Fitness Treadmill Comparison Guide 2025

Which SB Fitness Treadmill Should You Buy?

Choosing the right treadmill is no small decision. If you're searching for one that’s high-quality and built to last, SB Fitness is a name worth knowing. The brand's CT Series curved treadmills offer an impressive range of features tailored to different performance levels and space requirements.

In this article, we’ll break down the key differences between the three of SB Fitness’ best curved treadmills – the CT400, CT550, and CT700 – standout models in their commercial treadmill lineup. These three models reflect different tiers of performance and durability, giving you flexibility based on how often the machine will be used and by whom. We’ll compare each model’s core specs like deck length, resistance system, frame build, and user capacity so you can confidently choose which model meets your needs best.

Let’s get into what sets these treadmills apart and which one could be the best option for your setup.

Overview of SB Fitness Treadmills

SB Fitness is a U.S.-based brand known for building no-nonsense, high-performance strength and cardio equipment. Their reputation rests on a commitment to quality, minimal maintenance, and heavy-duty construction. They offer equipment that’s built for athletes, coaches, and gym owners who care about results, not gimmicks.

From squat racks to selectorized weight machines, they serve professional environments ranging from commercial gyms and college training centers to hardcore home gyms and performance facilities. Their treadmills follow this same principle: solid steel builds, practical designs, and unmatched durability.

SB Fitness equipment CT Series treadmills are built with durability at the forefront. These aren’t machines solely for weekend walkers. They’re designed to withstand daily sprints, intervals, and conditioning workouts without skipping a beat.

These are also made for power users who need equipment that can take a beating and keep performing. They feature:

• Steel-welded frames for long-term use

• Self-powered curved decks for better stride mechanics

• High user weight capacities

• Minimal electronic components for less maintenance

We’ll discuss and compare these features in-depth in later sections. 

SB Fitness Treadmill Comparison: Model Breakdown

SB Fitness CT Series Treadmills

The CT Series includes three curved treadmills we’ll compare today: CT400, CT550, and CT700. As a type of manual treadmill, each model is powered solely by your movement, which is ideal for building stride power and conditioning. The curved deck design encourages a natural running posture and increases muscle engagement, helping you get more out of each treadmill run.

What sets the CT Series apart is its balance of:

• Residential and Commercial-grade construction

• Simple user interface with no digital clutter

• Low-maintenance design

These machines are perfect for functional training gyms, athletic performance centers, CrossFit boxes, and home gyms. Next, let’s get into the unique strengths of each of these 3 models. 

SB Fitness CT400 – Best for Residential Use

The CT400 is the entry point into the CT Series, but don’t let that fool you. It’s still a workhorse. Built with a mid-range commercial frame, this non-motorized treadmill brings serious quality into home setups, small studios, and private training environments. It’s a great pick for users who want the feel of a commercial machine without the size, multi-user home gyms, and personal trainers running 1-on-1 sessions. 

Key Features:

• Compact curved deck that supports walking, light jogging, and low-impact conditioning

• Shock-absorbing flexible slats to reduce joint stress

• 3 manual magnetic resistance levels: Low, Medium, High

• Steel frame construction rated for home use

• Lower step-up height makes it more accessible for a wider range of users

Core Specs:

• Deck Length: 60"

• Max User Capacity: 450 lbs

• Incline Settings: Fixed (curved design)

• Speed Range: User-controlled

• Warranty: Limited Residential/Commercial

This model is best for walking, jogging, and interval work, not intended for sprint mechanics.

SB Fitness CT550 – Best Value

The CT550 curved treadmill strikes the perfect balance between performance and price. It features upgrades over the CT400 that make it better suited for larger gyms, without the bulk or cost of the CT700.

It’s a strong fit for mid-size gyms with moderate to high foot traffic and a good option for coaches or trainers needing reliable gear that doesn’t require a steep budget.

What Makes It the Best Value:

• Larger 20" running surface for improved comfort and stride efficiency

• 8 levels of magnetic resistance for varying intensities

• More reinforced structure for long-term use in moderate to high-volume settings

• Low 11” step-up height

• Backlit LCD display for basic workout feedback

Core Specs:

• Deck Length: Approx. 62"

• Max User Capacity: 350 lbs

• Incline: Fixed (curved design)

• Speed Range: Self-powered, User-controlled

• Warranty: Extended Commercial

• Resistance Adjustment: Manual dial with 8 magnetic levels

SB Fitness CT700 – Best for Maximum Performance

The CT700 is SB Fitness’s flagship treadmill. It’s engineered for the most demanding environments and users such as athletic facilities, elite performance centers, and home gyms where only the best will do. It’s ideal for collegiate and pro-level training programs, gyms with extremely high usage, lifters or athletes who want commercial-level performance at home. 

Why It’s the Top Performer:

• Longest and widest deck of the series for full stride extension

• Reinforced steel frame ensures maximum durability

• Smoothest belt mechanics reduce joint impact and fatigue during long runs

• 8 levels of magnetic resistance for progressive intensity

• Built for mental and physical challenges in elite settings

Core Specs:

• Deck Length: 66.6" 

• Max User Capacity: 400 lbs

• Incline: Fixed (curved design)

• Speed Range: User-controlled

• Warranty: Full Commercial Coverage

Other SB Fitness Treadmill Series

The brand also offers other models for users with different goals. The CS Series, for example, includes motorized treadmills better suited for casual users and light commercial settings.

These machines are great for small group fitness studios, residential users who prefer motorized walking and jogging options, and hotel gyms or wellness rooms.

CS Series treadmills typically include:

• Digital displays with basic metrics

• Motorized incline features

• Compact frames for space-saving setups

They’re still built with quality in mind, but they’re not designed for the sprint-focused, high-performance training that defines the CT line.

SB Fitness Treadmill Comparison of Features

Like we’ve previously mentioned, the SB Fitness CT Series is purpose-built for users who value functional training over flashy special features. Let’s take a closer look at what these models can offer. 

Motor Power & Durability

Unlike traditional treadmills, each self-powered treadmill in the SB Fitness CT Series do not use motors, and runs entirely on your effort. This approach to treadmill design enhances durability while eliminating motorized machines' complexity and maintenance concerns. The resistance is generated by the user’s own movement and enhanced by magnetic resistance settings: 3 levels on the CT400 and 8 levels on both the CT550 and CT700. Unlike digital treadmills with preset buttons, manual resistance requires some adjustment at first, but most users adapt quickly after a short learning curve.

This self-generated design significantly reduces long-term maintenance, eliminates reliance on electrical outlets, and allows for uninterrupted workouts even during power outages. Instead of horsepower (HP or CHP) ratings typically used to measure treadmill performance, SB Fitness focuses on frame strength, resistance variety, and user capacity to demonstrate long-term reliability:

• CT400: Built with a moderate-duty frame, this model is best for walking, incline walking, and light jogging. Great for casual daily use in a home gym or personal training setup.

• CT550: Upgraded structure makes it ideal for longer sessions, more frequent use, and heavier runners. Handles everything from steady-state cardio to intense sprint intervals.

• CT700: Features a fully commercial-grade frame, precision components, and high load capacity. Built for full sprint work, high-volume usage, and professional facilities.

If you’re accustomed to looking at continuous horsepower (CHP) ratings to judge a treadmill’s strength, the CT Series flips the paradigm–your output powers your progress, making it a more functional and engaging workout experience. These treadmills are ideal for metabolic training, sprint development, and real-world conditioning.

Running Surface & Deck Cushioning

Comfort, stride length, and joint protection are essential considerations, especially for a curved manual treadmill. SB Fitness addresses this by equipping each model with a flexible slat belt system that minimizes joint impact while supporting natural running mechanics. This makes the CT Series one of the most joint-friendly curved treadmill options on the market.

• CT400: Features ultra-thin flexible slats that offer maximum shock absorption, reducing joint impact and discomfort. The running area measures 60” L x 18” W, making it suitable for walking, interval training, and short-distance workouts.

• CT550: The 62"L x 20" W running surface provides extra space for mid-height users, runners, and those with longer strides. It’s a versatile balance between footprint and freedom. This model uses hard rubber slats, which provide a more durable, stable surface for busier environments.

• CT700: This high-quality treadmill delivers the most generous running surface with an approximate 66.6” L x 19” W. This is essential for tall users or anyone looking to do repeated sprint work at higher speeds or maintain a fast pace comfortably during longer runs.

The deck design ensures every step feels responsive and grounded. For users concerned about knee, ankle, or hip sensitivity, the slatted system provides more give than traditional treadmills, reducing fatigue over longer sessions.

Console Features & Display

SB Fitness takes a minimalist approach to console design. Unlike many consumer brands that load their consoles with entertainment features, touchscreen display, or app integrations, SB Fitness focuses on the essentials. This is consistent with their performance-first philosophy.

• CT400: This model includes a front digital display. It’s built for those who want to track distance, speed, time, and calories burned as they run. 

• CT550 and CT700: These come with a backlit LCD display and digital display, respectively, which show key training metrics like time, speed, distance, and calories burned. The interface is intuitive, easy to read, and requires no app pairing or user setup. Both also include built-in water bottle holders, making hydration accessible during intense sessions without breaking stride.

There are no built-in programs that require syncing, no subscription content, and no clutter. Instead, these treadmills give users full control of their workouts. This design is perfect for coaching environments or serious athletes who prefer uninterrupted focus and measurable effort.

By avoiding unnecessary tech and focusing on the essentials, SB Fitness eliminates distractions and lets users focus on form and performance. That said, additional features like their durable handrails, slatted belts, and water bottle holders support long sessions comfortably.

Incline/Decline Capabilities

Unlike traditional treadmills that rely on motorized incline functions, the CT Series uses a fixed curved running deck to simulate incline levels through positioning. There are no manual or automatic incline buttons; instead, users naturally shift forward or backward on the curve to change resistance.

• Front of the deck: Feels like uphill running; max resistance.

• Middle of the deck: Neutral position; moderate challenge.

• Rear of the deck: Easier surface for recovery or cooldowns.

This design not only removes mechanical complexity but also improves stride engagement. As you lean into the front zone for sprints or resisted walks, you activate more posterior chain muscles (glutes, hamstrings). This built-in incline variability makes the curved surface a powerful tool for real-world conditioning without the need for elevation motors.

Resistance Levels

The CT400 offers a simpler, more streamlined setup with just three resistance options (Low, Medium, High). Ideal if you want straightforward resistance without too much tweaking. CT550 and CT700 take it up a notch with eight levels of magnetic resistance, giving you finer control and versatility for different training types.

Foldability & Storage

The CT400, CT550, and CT700 are non-folding treadmills. These models are intentionally designed for permanent placement in fixed workout spaces such as garage gyms, commercial studios, and strength & conditioning rooms. Their sturdy, steel-framed builds do not accommodate folding or compact storage.

That said, all models include front-mounted transport wheels to allow for some mobility if you need to reposition the treadmill within your space. Still, these are not compact treadmills and require thoughtful space planning.

Before purchasing, it's important to measure your ceiling height and floor footprint:

• Allow at least 15" above your height for head clearance during upright running.

• Plan for at least 72"–80" of floor length depending on the model.

In return for this larger footprint, you gain unmatched stability, longevity, and performance compared to foldable alternatives.

Price Range

As of this writing, here’s a general price guide based on official SB Fitness listings:

• CT400: At around less than $2,000, the most affordable entry into curved treadmill training. Ideal for home users looking for quality without excessive extras.

• CT550: Priced at approximately $2,500, this model balances upgraded resistance and build features with a still-reasonable price point. Best value for small gyms or advanced home users.

• CT700: Placed significantly at a more premium price of around $2,800, this treadmill gets you full commercial-grade sturdy construction and pro-level specs.

Pricing may vary. For up-to-date information, visit our website. Given their build quality and self-powered design, all three models deliver strong long-term value, often outlasting traditional treadmills that rely on motors and digital components.

Training Experience with SB Fitness Treadmills

Built-In Workouts vs App Integration

SB Fitness takes a refreshingly simple approach to training tech. While many brands compete to outdo each other with app compatibility and subscription content, the CT Series stays true to its roots, offering a distraction-free experience built for serious performance.

The CT550 and CT700 models feature screens that display core workout metrics like time, distance, calories burned, and speed (user-generated pace). These basic readouts are more than enough for users focused on training outcomes rather than entertainment. Whether you’re sprinting, walking at an incline, or performing intervals, the display keeps your attention on performance.

While there are no preloaded programs or virtual training sessions built in, many users see this as a benefit. There are no monthly fees, no app glitches, and no unnecessary notifications mid-run. If you need structured guidance, a coach, or a whiteboard workout may help. 

These treadmills are not compatible with platforms like iFIT or Peloton, nor do they connect with third-party apps or training ecosystems. Instead, SB Fitness appeals to those who prefer self-directed sessions.

Heart Rate Monitoring & Smart Features

The CT Series avoids excessive smart features in favor of raw functionality. That means you won’t find built-in Bluetooth, advanced heart rate analytics, or touchscreens on these models, but that doesn’t mean you can’t track performance.

The CT550 and CT700 include basic pulse sensors compatible with some wireless chest straps, depending on the dealer’s package or add-on availability. These are best used for general heart rate zones, rather than real-time medical-level accuracy.

If you’re someone who tracks metrics with a smartwatch or external heart rate monitor, you can still pair your existing tools with your workouts. But don’t expect these treadmills to sync or send data via apps–they’re designed to reduce complexity, not increase it.

The result? A treadmill that supports focused, tech-minimal workouts for athletes, strength coaches, and users who want full control over their pace, progression, and form.

Noise Level & Ride Smoothness

One of the often-overlooked benefits of commercial-grade, non-motorized treadmills like the CT Series is how quiet they are in comparison to traditional motorized models. Because there’s no engine powering the belt, the bulk of the noise comes from user footfall and the rotation of the slat belt.

The CT700, in particular, is engineered for a smooth, quiet ride thanks to its reinforced frame and high-quality slat belt construction. Even when sprinting at high intensity, the deck absorbs much of the impact while minimizing excess vibration or frame flex.

For garage gyms or training facilities where noise is a concern, this is a huge plus. These treadmills can easily be used in early mornings or shared spaces without disturbing others–no hum of motors or thumping from a plastic belt.

Noise output will naturally vary depending on user speed, stride, and footwear, but overall, SB Fitness treadmills deliver a stable and relatively quiet experience compared to traditional motorized options.

SB Fitness Treadmill Comparison Chart

Need a quick refresher on the comparisons we’ve talked about? Refer to the chat below for an at-a-glance view of these models’ differences and similarities. 

SB Fitness vs Other Treadmill Brands

SB Fitness vs TrueForm

TrueForm is another well-known name in the curved treadmill space, particularly among performance-focused coaches and CrossFit athletes. While SB Fitness and TrueForm offer manual, curved decks and minimal electronics, key differences exist.

TrueForm treadmills tend to have more aggressive curvature and a higher price tag, often due to the customizable design and unique “force curve” that demands even more effort from the runner. They’re known for punishing bad form–great for coaching but potentially limiting for casual users.

SB Fitness, by contrast, offers a more balanced experience. The CT400, CT550, and CT700 are more approachable for all users of different fitness levels without compromising performance. They’re also more cost-effective, giving gym owners and home users more value per dollar.

SB Fitness vs AssaultRunner

Assault Fitness has made waves with its AssaultRunner series, another popular curved, manual treadmill option. These are frequently seen in functional fitness gyms and high-intensity interval training (HIIT)  studios due to their durable build and simplified consoles.

The CT Series and AssaultRunner models are comparable in many ways, but SB Fitness tends to offer a broader range of resistance settings (especially in the CT550 and CT700) and a sturdier frame at similar or lower prices. The CT models also have better deck cushioning, which may appeal to users seeking reduced joint impact.

If you're looking for a more versatile training experience and enhanced durability, SB Fitness typically provides a better long-term investment.

SB Fitness vs Tru Grit

Tru Grit's curved treadmills are newer to the scene and market themselves as budget-friendly alternatives to established brands. While they offer similar basic functionality, they lack the build quality, durability, and resistance customization of SB Fitness models.

Tru Grit may be a good entry point for budget-conscious users, but SB Fitness stands out for anyone looking for a true commercial-grade solution that can support years of intense use. Especially for gym settings or any fitness level, SB Fitness wins in both reliability and performance.

SB Fitness Treadmill Buyer’s Guide

Your Fitness Goals: Walkers, Runners, and HIIT

Choosing the right treadmill starts with understanding your goals. Are you looking for low-impact walking workouts, or high-intensity sprint intervals?

• CT400 is a great fit for casual users who value a compact footprint and don’t need advanced resistance levels. It’s ideal for walking, incline intervals, and light jogging.

• CT550 is the sweet spot for consistent runners and HIIT practitioners. Its 8 resistance levels allow for varied workouts, and the wider running surface gives you more freedom of movement.

• CT700 is the clear winner for athletes, advanced users, or anyone who wants the best equipment available. The longer deck, smoother ride, and commercial-grade build make it perfect for sprint training, loaded carries, or high-volume daily use.

Home Use vs. Commercial Gym Use

Home gym users may be tempted to default to the CT400, but it’s worth thinking long-term. If your home setup sees multiple users–or if you’re a serious athlete or coach–the CT550 or CT700 might be the better call.

• CT400 is best for solo users, personal training studios, and garage gyms where space is a premium and usage is moderate. Its simple design and zero-frills operation offer excellent ease of use, even for beginners.
  

• CT550 is great for shared spaces or higher-frequency use, such as semi-private training studios or performance coaching centers.
  

• CT700 thrives in busy commercial environments–think university weight rooms, CrossFit boxes, or athletic development facilities.
  

Each model is non-folding, so your space needs to accommodate a permanent footprint. If you’re planning your gym layout, make sure you account for extra room around the machine for getting on/off and any sprint or sled-style workouts.

Space Requirements & Storage Needs

None of the CT Series models fold for storage, which reflects their serious-use design. While this can be a downside for compact apartments or multipurpose rooms, it’s a major benefit for stability and durability.

Each treadmill comes equipped with transport wheels to help with minor repositioning, but they’re meant for fixed setups. Whether you're placing one in a garage gym or anchoring it in a commercial training space, measure your available footprint–and don’t forget to account for ceiling clearance, especially if you’re tall or plan to do incline walks.

Price Point vs Features

Here’s what you get at each level of the CT Series:

• CT400 (~$1,995): Affordable, minimal-resistance treadmill with high-quality construction. Ideal for lower-impact training.

• CT550 (~$2,495): Mid-tier value with premium upgrades–wider deck, better resistance range, and more durability.

• CT700 (~$2,795): Top-tier performance with all the bells and whistles. Built to handle any user, any day of the week.

Compared to other commercial treadmills, these prices are extremely competitive. And with zero ongoing subscription fees, the total cost of ownership stays low.

SB Fitness Treadmill FAQs

Are SB Fitness treadmills good for running?

Yes, particularly the CT550 and CT700. Both models offer long decks and multiple resistance levels that support sprinting, interval work, and endurance runs. The curved design encourages better stride mechanics and promotes muscle activation, making your runs more effective.

What’s the best SB Fitness treadmill for small spaces?

The CT400 is the most compact model in the lineup. It offers a shorter deck and a narrower profile, making it a great choice for home users with limited space. Just remember it’s not foldable, so measure carefully.

What do customers say about SB Fitness?

SB Fitness equipment consistently receives praise for its durability, simplicity, and value. Users appreciate the lack of unnecessary tech, the sturdy steel frames, and the smooth belt operation. Many buyers say their CT treadmill has held up for years without needing repairs or part replacements.

What kind of warranty comes with SB Fitness treadmills?

Warranty terms vary depending on your dealer, but generally:

• CT400 comes with a Limited Residential/Commercial warranty 

• CT550 includes an Extended Commercial Warranty

• CT700 carries a Full Commercial Coverage

SB Fitness Treadmill Comparison Guide: Conclusion

If you're in the market for a durable, performance-driven treadmill that doesn’t rely on apps or flashy screens, SB Fitness delivers. The CT Series offers rugged, self-powered machines designed for athletes, coaches, and home users who value results over gimmicks.

Choose the CT400 if you want a compact, no-fuss home treadmill for walking or general cardio. Step up to the CT550 if you’re planning to run, train frequently, or share this great machine. Or, go for the CT700 if you want the best-in-class model built for elite training and high-frequency use. All models share the same core values: steel construction, no motors, minimal maintenance, and maximum intensity.

Ready to upgrade your training setup?  Check out our full SB Fitness Equipment Collection to view specs, explore real customer reviews, and get expert help choosing the right treadmill for your space.