Tackle your in-home cardiovascular fitness routine with the Sunny SF-B2906 Upright Bike. Cycle through 8 levels of magnetic resistance to find the right level of intensity for you. It’s easy when you want it, hard when you need it. The smooth belt-drive mechanism ensures your cardio workout will be quiet, especially in shared spaces.
The Sunny SF-B2906 Upright Bike comes equipped with a fitness monitor that allows you to stay focused on your fitness goals. Track your time, speed, distance, calories burned, and pulse on one convenient and straightforward screen. To track your pulse, you’ll need to hold onto the integrated pulse sensors in the handlebars. The included heart rate zone sticker is a nice touch to have if you want to keep it in a specific BPM zone.
Soft, comfortable yet supportive, the SF-B2906’s sizeable comfortable seat supports a maximum weight capacity of 240 lbs (109 kg). Adjust the 2-way adjustable seat that can accommodate leg inseams between 25.5 inches and 35.5 inches. Textured non-slip foot pedals will accommodate all sizes, and the grip will ensure safe footing during the most demanding and vigorous workouts!
Learn more in my complete review below!
Product: Sunny SF-B2906 Upright Bike
Warranty: Frame 3 years / Parts 180 days
My rating: 8.5/10
Affiliate Disclosure: As a Sunny Health & Fitness Affiliate Program participant, I earn commissions on purchases made through links in the post. Full disclosure
Details and Specifications
- Assembled dimensions: 35L x 20.5W x 51.5H inches (89L x 52W x 131H cm)
- Assembled weight: 43.4 lbs (19.6 kg)
- Weight capacity: 240 lbs (109 kg)
- Seat: Adjustable
- Handlebars: Adjustable
- Resistance: Manual magnetic, eight levels
- Fitness Monitor: Time, speed, distance, total distance, calories burned, pulse, goals, scan
- Extras: Device holder
- Warranty: Frame 3 years / Parts 180 days
SF-B2906 Frame construction
The Sunny SF-B2906 features a steel frame combining cylindrical, rectangular, and oval tubes in its construction. This particular Sunny exercise bike’s most striking feature is the long front upright bar, aiming to provide a healthier position even for the tallest users.
All the steel tubes in the bike’s construction come double-coated with a corrosion-resistant paint finish, light gray. The covers of the drive and resistance elements are thermoplastic material; they’re also gray to match the bike’s rest.
Like many other light-capacity upright bikes, the Sunny SF-B2906 is not a bulky fitness machine. With all the parts assembled, it is only 35″ (89 cm) long and 20.5″ (52 cm) wide. Also, its highest point is the handlebar, which reaches approx. 51.5″ (131 cm) above floor level. It is advisable to leave at least two feet of clearance all around the bike for easy access and safe usage.
The bike doesn’t have a step-through design, such as the Circuit Fitness AMZ-594U, for example. However, stepping over its drive and resistance unit and taking a position on the seat shouldn’t be too difficult. This is because the section between the seat tube and the front upright tube is only approx. 15″ (38 cm) above floor level.
The fully assembled bike is relatively light as well. Its net weight is only 43.4 lbs (19.6 kg). Therefore, one person can carry and build it. Once assembled, transporting the bike is easy via two transport wheels integrated into the front base stabilizer. Also, its rear stabilizer features two polygonal caps that can rotate to serve as floor levelers.
Seat and handlebars
The Sunny SF-B2906 upright exercise bike includes a reasonably large saddle, approx. 11″ (28 cm) long and 10″ (25.4 cm) wide, so it provides plenty of contact surface. Its top is a hard plastic shell with a high-density foam cover. Its body is contoured to provide extra breathability.
The seat features a 3-bolt attachment system. Its post features a triangular plate at the top to which the saddle attaches via three bolts. The seat does not have a horizontal slider for front-to-back adjustment, but its upright post has nine adjustment positions.
Thus, the bike can comfortability accommodate users with an inseam between 25.5″ and 35″ (65 – 89 cm). In other words, it fits users up to 6’3″ (190 cm), allowing for a complete range of motion. It also has a maximum user weight capacity of 240 lbs (109 kg).
The bike comes equipped with a 3-grip handlebar. It offers the possibility of adopting a climbing grip, a standard parallel grip, and a low one. The handlebar is non-adjustable. It attaches to the bike’s front mast via two screws to not adjust its angle or height.
The bike’s handlebar comes equipped with two metallic pulse sensors. They integrate into the lower grips. Also, the bike’s grips feature high-density foam covers for optimal comfort.
SF-B2906 Resistance system
The Sunny SF-B2906 upright bike comes equipped with a manual magnetic resistance system. Therefore, you don’t need an adapter or a power source for it to adjust the resistance. On the other hand, the bike cannot automatically adjust the resistance, and the included fitness monitor does not have pre-set workout programs.
The main resistance elements are the tension knob visible at the top of the front upright bar and an internal magnetic brake connected to it through a steel cable. Therefore, when you turn the knob, the magnetic brake moves either closer or farther from the flywheel, increasing or decreasing the pedaling difficulty.
The bike makes available eight tension levels. The first one is relatively light, great for recovery training, workout warm-ups, or muscle toning. The 8th tension level provides considerably more pedaling difficulty, simulating a hill climb and offering the possibility to burn more calories.
The bike comes with a perimeter-weighted flywheel. This type of construction improves motion stability and inertia, providing a more consistent pedaling feel. However, the flywheel is not too heavy. Its exact weight is not specified, but considering that the bike weighs more than 43.4 lbs (19.6 kg), the flywheel probably weighs approximately 10 lbs (4.5 kg).
The flywheel is bi-directional. Thus, you can pedal in reverse if you want to diversify your workouts. However, coasting is not possible on this bike, and when pedaling in reverse, you should get the same pedaling resistance. At the same time, the fitness monitor continues to track distance traveled, calories, etc.
Like most other magnetic resistance exercise bikes, the Sunny SF-B2906 model comes equipped with a belt drivetrain.
This means that you don’t need to take the bike’s drive components apart to lubricate the drivetrain; a belt does not require lubrication. The belt drive system also contributes to the ride’s overall smoothness as it generates less vibration than a chain.
The bike’s crankset features short, cylindrical arms, steel-made, and chrome plated. However, it’s not for spin workouts, so standing up on the pedals is not advisable. The pedals are a durable thermoplastic material, and they have adjustable straps and a textured surface for improved foot stability. They also have a self-leveling design.
SF-B2906 Fitness Monitor
The Sunny SF-B2906 upright bike comes with a reasonably simple fitness monitor. It features an LCD that tracks time, distance, total distance, speed, calories burned, and pulse. Unfortunately, the speed and distance display in MPH and miles; there is no option for changing them to metric units.
Also, the monitor is not telemetric. It can only track your pulse if you hold on to the integrated pulse sensors. It cannot communicate with a wireless HR chest strap.
The fitness monitor has three buttons. The Mode button allows you to scroll through the workout metrics and select the one that you want to view on display. It also offers the possibility to choose the Scan Mode, which rotates all the metrics showing each one for 6 seconds.
The Set button covers the target setting function. It gives you the possibility to select a workout target for time, distance, and calories.
When choosing a target, the monitor counts down from the specified value until it reaches zero. And finally, the Reset button clears all the values on the monitor except the odometer, which resets zero if you remove the batteries.
The monitor requires two AAA batteries as its power source, which come with the bike. It starts up when you press one of the buttons or when you begin pedaling. It also automatically turns off after 4 minutes of inactivity on the bike.
Two other notable features to note here are the device holder and the heart rate zone sticker. The device holder consists of a small shelf placed above the display. It is large enough to accommodate most tablets and smartphones.
However, the fitness monitor does not have a USB port or other ports to connect your device to it. The HR sticker is a nice touch to have at hand if you want to keep it in a specific BPM zone without consulting the manual.
SF-B2906 Assembly and Maintenance
The bike’s central unit with the base frame, belt, crankset, flywheel, and resistance system comes pre-assembled. You only need to attach the two base stabilizers, the pedals, the seat post, the saddle, the front upright bar, the handlebars, and the fitness console.
This shouldn’t take more than an hour of your time. The task is relatively simple, the manual provides clear assembly instructions, and all the necessary tools come with the bike.
Once assembled, you don’t have to worry too much about maintenance. The internal parts and the drive train don’t require any lubrication. So, you only have to keep the bike clean and periodically check if all the parts still function correctly and hold tight in place.
- Sturdy construction – can support users up to 240 lbs;
- Compact design;
- Adjustable stabilizers on the rear base;
- Transport wheels;
- Pulse sensors integrated into the handlebar;
- Bi-directional flywheel;
- Smooth, frictionless magnetic resistance;
- Whisper-quiet belt drive;
- Weighted pedals with straps;
- Fitness monitor included – it tracks time, distance, total distance, calories, speed, and pulse;
- Goal settings for time, distance, and calories;
- HRC sticker;
- Device holder;
- Easy to assemble;
- Little maintenance required;
- Decent warranty.
- No bottle holder;
- The fitness monitor does not have online connectivity;
- No handlebar adjustability.
Sunny SF-B2906 Upright Bike Summary
The Sunny SF-B2906 is an upright exercise bike for home use, and it comes equipped with a manual magnetic resistance system. It offers eight resistance levels, a maximum user capacity of 240 lbs (109 kg), and a fitness monitor that tracks all the essential workout metrics.
Moreover, it’s an excellent machine for light cardio training, muscle toning, stamina development, and weight loss. It’s also an affordable bike currently available for less than $250.
I hope you found this article helpful and informative. If you have anything you would like to share or any opinions about my website, please speak up. I look forward to your comments, questions, and the sharing of ideas.