SB Fitness Equipment CT400
A self-powered curved treadmill sold only through SB Fitness's own site, one step up from the CT250. It has a 60" x 18" slat deck, 300 lb capacity and three magnetic resistance levels. It does not work as a desk treadmill: the console sits on the front handlebar and the resistance lever on the right upright, so taking the rails off would remove every control. Buy it as a home-gym trainer for walking, jogging and intervals, and look at the CT250 if desk walking is the goal.
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Warranty
For home use, SB Fitness covers the frame for 10 years, parts for 5 years, the console for 2 years and labor for 1 year. Commercial use drops that to 5 years frame and 3 years parts. With no motor, the parts that wear are the slats and bearings, so the 5-year parts term is the one that matters, and it beats the CT250's 2 years.
Motor
Manual treadmills replace the motor with a rider-powered slat belt, so there are no brushes, coils, or controllers to fail.
Stars
Motor power
Shock
SB Fitness builds the deck from flexible, shock-absorbing slats over nylon bearings and rates the slats for 150,000 miles. It publishes no cushioning measurement, so this is the brand's claim rather than a tested figure.
Viability
Score: 0. The digital console mounts on the front handlebar and the resistance lever rises from the right upright, both visible in SB Fitness's product photos. The full handrails are part of the frame, and removing them would leave no display and no way to change resistance. At 73" long, 30.5" wide and 61.6" tall, with a 12" step-up, it is also a machine that stands beside a desk rather than under one.
Model
A curved slat treadmill with no motor and no power cord. You set the pace by where you stand on the curve: step toward the front to speed up, drift back to slow down, and stop walking to stop the belt. Nylon track bearings add a little natural drag, and the three magnetic resistance settings (low, medium, high) add more for power walking or sprint intervals. SB Fitness says the CT400 suits walking and jogging best and that long runs or all-out sprints feel harder on it than on the CT700 or CT850.
Pros
- 5-year parts warranty on a machine with no motor or drive electronics to fail.
- 60" x 18" running surface fits a full running stride, unlike the CT250's 50" x 16".
- Three magnetic resistance levels for walking, power walking and intervals.
- No electricity needed, so it can go anywhere in the house or garage.
Cons
- Not usable under a desk: the console and resistance lever both mount on the rails.
- 165 lb, 73" long and 61.6" tall, with a 12" step-up onto the deck.
- Sold only through SB Fitness, with curbside freight; self-assembly unless you pay for local setup through a third-party contractor.
Lacks incline. Sports medicine recommends 3% for knee health. Why it matters + workaround.
The CT400 has been on SB Fitness's store since December 2022 and is the brand's entry curved treadmill above the compact CT250. On 2026-10-06 the brand site listed it at $1,495, down from a $2,495 list price, with open-box and scratch-and-dent units a little cheaper. It has no Amazon listing.
Specifications from SB Fitness:
- Assembled size: 73" long, 30.5" wide, 61.6" tall.
- Running surface: 60" long, 18" wide.
- Weight: 165 lb. Maximum user weight: 300 lb.
- Step-up height: 12".
- Resistance: 3 magnetic levels (low, medium, high), set with a lever on the right upright.
- Console: digital display for time, speed, distance and calories, with time and distance goals.
- Track: nylon bearings under flexible slats rated for 150,000 miles.
- Moving it: built-in wheels and transport handles, plus leveling feet.
- Power: none.
- Warranty, home use: 10 years frame, 5 years parts, 2 years console, 1 year labor. Commercial (light use): 5 years frame, 3 years parts, 2 years console, 1 year labor.
SB Fitness cites awards from Healthline ("Best Value Curved Treadmill"), Active.com and Greatist ("Best Budget Curved Treadmill") and RunToTheFinish ("Best for At Home Walker").
Stopping relies on the curve and gravity: high resistance slows the belt, and the rear of the deck curves upward to help you stop. The full handrails give balance support during the learning curve.
Within SB Fitness's curved lineup, the CT250 is the smaller, cheaper machine that some buyers adapt for desk walking by skipping the handrails, while the CT550, CT700 and CT850 add build quality and sprint capacity at higher prices.
Full specs
 SB Fitness Equipment CT400 Check price | |
|---|---|
| Price (US) | $1,495 |
| Motor | Manual (no motor) |
| Belt (L x W) | 60" x 18" |
| Max user weight | 300 lb |
| Height | 61.6" |
| Footprint (L x W) | 73" x 30.5" |
| Unit weight | 165 lb |
| Shock absorption | Yes |
| App | No |
| Warranty | 5 yr |