Sunny Health & Fitness SF-RB4850 Recumbent Bike Review 

The Sunny Health & Fitness SF-RB4850 Recumbent Bike is a decent stationary home exercise equipment that you can get without having to break your bank account.  

It features a backlit LCD performance monitor that tracks the user’s workout progress, and the console includes 24 workout programs, a recovery function, and more.  

The seat backrest is ventilated like the one on the Niceday Recumbent Bike for air breathability.  

Before we delve more into the details of the review, click right here to have a peek at the best price of the Sunny Health & Fitness SF-RB4850 Recumbent Bike on Amazon.  

The Frame & Construction

The Sunny Health & Fitness SF-RB4850 Recumbent Bike is equipped with an anti-corrosion coated alloy steel frame and other protective and cosmetic covers that are made of ABS material.  

It is robustly built to support users that are up to 300 lbs./136 kg in weight.  

The sturdy base construction with adjustable levelers at the rear end provides optimum stability. Users can comfortably work out without experiencing wobbling.  

The assembled weight of the unit is 86.4 lbs./39 kg. Users can easily move it around the room without a problem through the front-mounted transport wheels and the lifting handle attached to the rear base.  

The overall assembled dimensions of the recumbent bike are 59’’ long by 26’’ wide by 47.5’’ high. In other words, the workout area the unit needs would be 4’9’’ (149.86 cm) in length by 2’16’’ (66 cm) in width, plus a recommended extra clearance of 2’ on each side for ease of access and safety during workouts.  

Recumbent bikes such as this feature a step-thru design that enables the elderly and those with joint issues to easily step in and out of the bike without having to whine and groan.  

Moreover, this bike offers low-impact cardiovascular workouts for weight loss, muscle toning, and improvement of strength and stamina.  

The Seat of the Sunny Health & Fitness SF-RB4850 Recumbent Bike 

The seat on this bike is large (12.5’’ L x 16.5’’ W x 3.5’’ H), contoured, and padded. It also has a ventilated backrest for lumbar support. Therefore, it provides consistent comfort during a prolonged workout session. 

The is attached to a horizontally slanted chrome plated rail. Thus, even though the seat can only be adjusted backward and forward, its height also changes between 22.6’’ and 25.5’’.  

Due to the seat adjustability, the bike supports 29.9’’ to 29.4’’ inseams (length of the leg from the inner thigh to the ankle). In other words, approximately, 4’8’’ to 6’4’’ tall individuals can be accommodated. But it is safer to measure your inseam to be sure about this.  

Users can easily and quickly adjust the seat even while seated via the adjustment lever below the right side.  

The backrest cannot be adjusted independently.  

There are nonadjustable handles on each side of the seat which are designed to provide the support needed when a user assumes a sit-back posture during a workout.  

Furthermore, heart rate sensors are integrated into the seat handles so that when grasped while exercising the user’s heart rate data will be read and transmitted to the monitor.  

The handles are coated with sponge-like soft rubber foam material for a comfortable and secure grip.  

The Handlebar 

Other than the seat handlebar, there is yet another one at the front mast of the bike. This one is also nonadjustable and does not have heart rate sensors on it. It is positioned well to suit users of different shapes and sizes.  

The handlebar is coated with soft foam material as well for a comfortable and secure grip.  

Pedals 

The pedals are self-leveling, large, and textured with adjustable safety straps. They are ergonomically designed to accommodate different foot sizes and to keep the footing secure and comfortable even in moments of intense pedaling.  

They are fixed to a quality crankset and crankarms.  

These pedals are best ridden with standard gym shoes or barefoot (not recommended).  

The Drive 

The Sunny Health & Fitness SF-RB4850 Recumbent Bike features a belt drive system that comprises a pulley, an anti-stretch belt, and a 6.6 lbs./3 kg perimeter weighted flywheel.  

This type of drive system has been famous for its smooth, and quiet operation and maintenance-free status. Thus, most stationary recumbent bikes, if not all, are produced with a belt drive system because users prefer them.  

Consequently, you can work out with the bike around family members or those living nearby without invading their privacy.  

You don’t have any responsibility for maintaining the drive system.  

Since the drive system is bidirectional, you can pedal in reserve if you so wish.  

The Resistance 

This recumbent bike has an electromagnetic resistance system with 16 adjustable levels. This means that the resistance system requires power to function; it must be plugged into a power source.  

The resistance system mainly comprises a magnetic brake pad, a servo motor, and a flywheel. Depending on the resistance adjustment, the servo motor moves the brake pad closer or farther away from the flywheel to generate resistance by the release of magnetic fields.  

This system produces resistance without any friction or noise. Therefore, the bike’s operation remains clean, smooth, and quiet even when resistance is engaged.  

No maintenance is required as well.  

The resistance can be adjusted via the buttons on the console, and if a preset workout program is selected, the resistance will be applied automatically with the pre-assigned level.  

The 16 resistance levels provide easy to intense workout challenges that can help users achieve their fitness goals.  

The Console 

The console of the Sunny Health & Fitness SF-RB4850 Recumbent Bike has 24 built-in programs, a colorful backlit LCD monitor, and a couple of navigation buttons.  

The 24 programs include a manual program, 12 preset workout programs (P2-P13), Target Heart Rate Program, 4 Heart Rate Control Program (55%, 65%, 75%, and 85%), 4 User Programs, Watt Control Program, and Body Fat Program.  

These workout programs are resources that will challenge and make your workout experience productive without feeling boredom.  

The performance monitor tracks and simultaneously displays workout stats such as Time, Distance, Speed, Odometer, Watts, Program, Resistance Level, Calories, Heart Rate, Target Rate, and RPM.  

However, the display switches RPM to Speed, Odometer to Distance, and Watts to Calories. 

You can set a countdown goal for Time, Distance, and Calories. Speed and Distance metrics are measured in mph and miles, respectively.  

There is a Recovery function that calculates the user’s heart rate recovery and produces a result that is usually between F1-Excellent to F6-Poor.  

Accessory 

The SF-RB4850 Recumbent Bike has a built-in tablet holder on the console. This helps the user to keep a tablet/smartphone device handy for entertainment or for watching workout videos from YouTube and the Sunny Health & Fitness website.  

There is also a water bottle holder attached to the console mast, designed to help users maintain proper hydration. 

Storage 

The Sunny Health & Fitness SF-RB4850 Recumbent Bike is not foldable but it is not bulky either.  

A storage area with measurements of 4’9’’ (149.86 cm) in length by 2’16’’ (66 cm) will be accommodative.  

Users won’t have a difficult time moving the bike around the room because there are transport wheels at the front base and a lifting handle at the rear stabilizer base. 

Pros/Features Overview 

• The construction is sturdy and durable 
• It supports 300 lbs./136 kg maximum user weight capacity 
• It is stable and portable, thanks to the integrated robust stabilizers and transport wheels 
• The 2-way adjustable seat is large, contoured, and padded with ventilated backrest.  
• Bike supports 29.9’’ to 39.4’’ inseams 
• It has a belt drive system that provides smooth and quiet operation 
• It is equipped with an electromagnetic resistance system with 16 adjustable levels; thus, users will experience easy to challenging workouts 
• HR contact grips for heart rate monitoring 
• 24 built-in workout programs that include a manual program, 12 preset workout programs (P2-P13), Target Heart Rate Program, 4 Heart Rate Control Programs (55%, 65%, 75%, and 85%), 4 User Programs, Watt Control Program, and Body Fat Program 
• Recovery function; 
• Countdown goal for Time, Distance, and Calories; 
• Pedals are self-leveling, large, and textured with adjustable safety straps for secure and comfortable footing 
• There are 2 sets of handlebars that are coated with soft rubber foam material 
• Easy assembly 
• Easy to maintain 
• A tablet holder is included 
• A water bottle holder is included 

Cons 

• The console is not telemetric 
• Not compatible with any workout app

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Warranty  

• Frame: 3 Years 
• Parts: 180 Days  

Product Dimensions & Specifications 

• Length: 59’’ 
• Width: 26’’ 
• Height: 47.5’’ 
• Shipping Dimensions: 61.4’’ L x 10 W x 25.6’’ H 
• Net Weight: 86.4 lbs./39.19 kg 
• Gross Weight: 100.3 lbs./45.49 kg 
• Maximum User Weight Capacity: 300 lbs./136 kg 
• Supported Inseam: 29.9’’-39.4’’ 
• Flywheel Weight: 6.6 lbs./3 kg 
• Frame: Steel 
• Drive: Belt 
• Resistance: Electro-Magnetic with 16 adjustable levels 
• Seat: ventilated backrest, padded, contoured, and 2-way adjustable 
• Handlebar: 2 sets, nonadjustable, coated with soft rubber foam 
• Pedals: Self-leveling, large, and textured with adjustable safety straps 
• Programs: 24 
• Monitor: Colorful, backlit LCD  
• Recovery Function 
• Transport wheels 
• A tablet holder 
• A water bottle holder 

Shipping  

Once an order is placed, especially in vendors such as Amazon, the product is immediately prepared for shipping. When the product is shipped out a tracking ID will be sent out to you to enable you to monitor the product in transit and to know where it is at different stages until it gets to you.  

The gross weight of this recumbent bike shipping box is 100.3 lbs./45.49 kg with dimensions of 61.4’’ long by 10’’ wide by 25.6’’ high.  

If you choose the free shipping option, the product might get to you in a couple of days or weeks depending on the destination. However, the premium shipping option which usually attracts extra cost gets the product in a couple of days regardless of the destination. 

Assembly 

The Sunny Health & Fitness SF-RB4850 Recumbent Bike is not hard or complicated to assemble since the major parts are preassembled at the factory.  

You only need to attach the stabilizer bars, the handlebars, the mast, the console, the pedals, the seat, and the backrest.  

However, you may choose to pay for the assembly. So that someone will come over to put the bike together for you.  

An instruction manual that details how to assemble the bike and the tools needed are included in the package.  

Maintenance 

To keep this bike in a top shape you must always keep it clean and examine the parts to ensure that they are tight and in good condition. 

Moreover, endeavor to store it in an environment that is clean, dry, and cool.  

More details will be in the user’s manual. 

Conclusion 

The Sunny Health & Fitness SF-RB4850 Recumbent Bike is designed for home use. It has some features such as the 24 built-in programs, recovery function, countdown goals, and others that are designed to help users achieve their fitness goals. 

It supports 300 lbs./136 kg maximum user weight capacity and 29.9’’-39.4’’ inseams.  

Its belt drive system ensures smooth and quiet operation, while the electromagnetic resistance system with 16 adjustable levels provides a variety of low-impact cardiovascular workout challenges for weight loss and improvement of strength and stamina.