SB Fitness Equipment
SB Fitness CT550 Self Generated Curved Treadmill
SB Fitness CT550 Self Generated Curved Treadmill
4.73 / 5.0
(11) 11 total reviews
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Versatile curved treadmill with magnetic resistance for walking, jogging, running, and HIIT.
Best for: Home gyms, personal trainers, HIIT enthusiasts, and small studios seeking a balanced, user-friendly curved treadmill with excellent control and a wider deck.
The CT550 builds on the popular CT400 platform with harder rubber/nylon slats and 8 levels of magnetic resistance. This combination delivers a more traditional curved treadmill feel while shortening the learning curve and giving you precise control over intensity. The spacious 20" wide running surface and backlit LCD console make it comfortable for longer sessions, while the self-powered design keeps operating costs at zero.
It excels at walking, power walking, jogging, running, and HIIT intervals. Note: Due to the nylon track bearings, it is not ideal for sustained high-speed sprinting (our CT700 and CT850 models with stainless steel bearings perform better for elite sprint training).
Compare All SB Fitness Curved Treadmills →
Key Features & Benefits
- 8 Magnetic Resistance Levels — Easy cadence control and faster adaptation for all fitness levels
- Wider 20" deck — More stable and comfortable for runners and larger users
- Hard rubber/nylon slats — Durable grip with good shock absorption
- Nylon track bearings — Natural resistance for added workout intensity (best for HIIT and controlled training)
- Built-in water bottle holder — Convenient hydration during training
- No electricity required — Use anywhere in your home or studio
Advantages of Curved Treadmills (like the CT550) vs Motorized Models
- 30% increased calorie burn
- 100% energy efficient (powered by you)
- 30% increased oxygen consumption
- 16% increased heart rate
- Promotes better running form and muscle activation
- No maximum speed limit
- Immediate speed adjustment — ideal for HIIT
- Greater reliability and longer service life (no motor/electronics to fail)
Detailed Specifications
| Specification | Details |
|---|---|
| Assembled Dimensions (L x W x H) | 70" x 34" x 57" |
| Running Surface | 20" W x 62" L |
| Product Weight | 181 lbs |
| Max User Weight | 350 lbs |
| Step-Up Height | 11" |
| Track Bearings | Nylon (natural resistance) |
| Slats | Hard rubber / nylon slats |
| Resistance Levels | 8 magnetic |
| Console | Backlit LCD (distance, speed, time, calories, total miles) |
| Transport Features | Built-in wheels + transport handle |
| Leveling Feet | Yes |
| Water Bottle Holder | Yes |
| Electricity Required | None |
| Warranty (Residential) | Frame: 10 years / Parts: 5 years / Console: 2 years / Labor: 1 year |
| Warranty (Commercial) | Frame: 5 years / Parts: 3 years / Console: 2 years / Labor: 1 year |
Commercial Suitability: Light to moderate use.
Safety Features
- Gravity-assisted start/stop using the curve of the track
- Magnetic resistance helps control speed and stopping
- Anti-skid slats provide excellent grip and shock absorption
- Full handrails for stability and immediate stopping support
Why Choose the CT550?
- Wider deck and magnetic resistance make it more versatile than entry-level models
- Excellent balance of comfort, performance, and value for HIIT and daily training
- Durable enough for home and light commercial environments
- Simple maintenance and strong warranty coverage
Common Questions
Is the CT550 good for sprinting?
It handles HIIT and shorter speed intervals well, but the nylon bearings make it less ideal for sustained high-speed sprinting. For elite sprint training, we recommend the CT700 or CT850.
How does it compare to the CT400 or CT700?
Check the full comparison in our buying guide.
Shipping & Assembly?
Professional curbside freight shipping with clear instructions. Assembly video available. Most customers assemble within an hour. In-home setup available in many areas via 3rd party contractor. Email us for quote.
Financing?
Flexible options at checkout.
Ready to take your training to the next level?
Add the CT550 to your cart or contact us with any questions. We’re happy to help you choose the right model.
Shipping & Returns We offer curbside freight shipping on all treadmills with clear delivery scheduling. See full details in our Shipping Policy.
We want you to be confident in your purchase. If the treadmill isn’t the perfect fit, you have 30 days to return it. See our Return Policy for complete details, including our fair restocking policy for unopened items.
Questions about shipping, assembly, or returns? Contact us anytime at sales@sbfitnessequipment.com — we’re happy to help.
Browse All Curved Treadmills → Full Treadmill Buying Guide →
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Why Buy from SB Fitness Equipment?
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Free Shipping
All items in store ship for free. Please see product details above for lead times and shipping method.
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No Sales Tax
Exludes shipping addresses in the state of Pennsylvania.
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Financing Options Available
Shop Pay Installments offers financing solutions to fit your needs and budget.
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Satisfaction Guaranteed
We're here for you to answer questions and listen to your concerns. If you are unsatisfied for any reason, we will make it right.
The treadmill has been great . The assembly was pretty easy, definitely easier with 2 people.
Takes a few uses to get used to running on it but it is well worth it. You will have great workout. The belt is much easier on the knees and back and the treadmill makes you use better form. This is well worth the purchase.
I only recently became aware of manual treadmills and after considerable research, I decided to go with the CT550. The treadmill was delivered quickly. Assembly was straightforward and much easier than I expected. I referenced the assembly video on YouTube and it helped tremendously. Everything was up and running within an hour after unboxing all the components and taking my time with the assembly process. I have been using the treadmill every day and am very happy with my decision to purchase it. It's taking me some time to work out the balance and walking speed, but it is an amazing workout! The only downside was the lack of information in the user manual about how to use the digital display. In my opinion, the treadmill is well worth the investment. I look forward to using my CT550 for many, many years to come!
I chose the SB 550 because I wanted to get a better workout than just trying to move my feet to keep up with a motorized moving platform. Both my husband and I were astonished at the difference and how we are working muscles that we never have on a treadmill, or even by taking an actual walk outside. The machine is SOLID! We're so glad we made this investment!
Wanted to give my update after one year. I listed many of my pros/cons in my last review but wanted to give an update.
One year later I have had no issues with this treadmill. Still functions as well as the day it arrived. I still think the monitor can be improved, and at this point I have let the batteries die, and just use my Garmin watch to track calories and heart rate. The other con I pointed out about the tension rod. I do believe this actually adds quite a bit of toughness after using it for a year, so that is not a con anymore.
I think this is a great addition, I run regularly on it and my wife walks almost everyday with a weighted vest and loves it as well. Great to be able to use in our cold winters year round.
Have recommended this company based on customer service, product, and with how pleased I am so far a year later. Would buy again!
We're happy with our choice to get the CT550. The packaging and delivery were good, everything there, and assembly was pretty easy. It is useful to refer to the YouTube videos for cable connecting during assembly. It takes some getting used to after years of a having a great motorized treadmill, and it kicks your butt at first (our use is fast-paced walking). Once you are used to it though, it works great and a better workout than typical treadmills. The only minor weakness is the user manual - it needs improvement.
The treadmill has been great . The assembly was pretty easy, definitely easier with 2 people.
Takes a few uses to get used to running on it but it is well worth it. You will have great workout. The belt is much easier on the knees and back and the treadmill makes you use better form. This is well worth the purchase.
I only recently became aware of manual treadmills and after considerable research, I decided to go with the CT550. The treadmill was delivered quickly. Assembly was straightforward and much easier than I expected. I referenced the assembly video on YouTube and it helped tremendously. Everything was up and running within an hour after unboxing all the components and taking my time with the assembly process. I have been using the treadmill every day and am very happy with my decision to purchase it. It's taking me some time to work out the balance and walking speed, but it is an amazing workout! The only downside was the lack of information in the user manual about how to use the digital display. In my opinion, the treadmill is well worth the investment. I look forward to using my CT550 for many, many years to come!
I chose the SB 550 because I wanted to get a better workout than just trying to move my feet to keep up with a motorized moving platform. Both my husband and I were astonished at the difference and how we are working muscles that we never have on a treadmill, or even by taking an actual walk outside. The machine is SOLID! We're so glad we made this investment!
Wanted to give my update after one year. I listed many of my pros/cons in my last review but wanted to give an update.
One year later I have had no issues with this treadmill. Still functions as well as the day it arrived. I still think the monitor can be improved, and at this point I have let the batteries die, and just use my Garmin watch to track calories and heart rate. The other con I pointed out about the tension rod. I do believe this actually adds quite a bit of toughness after using it for a year, so that is not a con anymore.
I think this is a great addition, I run regularly on it and my wife walks almost everyday with a weighted vest and loves it as well. Great to be able to use in our cold winters year round.
Have recommended this company based on customer service, product, and with how pleased I am so far a year later. Would buy again!
We're happy with our choice to get the CT550. The packaging and delivery were good, everything there, and assembly was pretty easy. It is useful to refer to the YouTube videos for cable connecting during assembly. It takes some getting used to after years of a having a great motorized treadmill, and it kicks your butt at first (our use is fast-paced walking). Once you are used to it though, it works great and a better workout than typical treadmills. The only minor weakness is the user manual - it needs improvement.