Sunny SF-RBD4703 Recumbent Bike | Multitask While You Workout

The Sunny SF-RBD4703 Recumbent Bike with Workstation allows you to get a great low-impact cardio workout while multitasking. The bike itself is sturdily built and supports an extended user weight capacity of up to 350 lbs.  It also features a step-through design that is safer and less strain on your back and legs when mounting or dismounting.

The large and removable workstation on the SF-RBD4703 provides a great place to set your laptop, documents, book, and tablet. Get work done with this spacious connectable desktop while you get in a great, low-impact cardio exercise. There is no need to limit your cycling before or after work when you can do both comfortably with this recumbent bike.

The Sunny SF-RBD4703 Recumbent Bike with Workstation comes equipped with an easy-to-use LCD fitness console that displays motivating workout stats as you exercise, including time, speed, distance, odometer, calories, and scan. The monitor also features a built-in media shelf to place a tablet or mobile phone.

To make your longer sessions as comfortable as possible, the SF-RBD4703 comes outfitted with an extra padded seat and backrest to ensure proper blood flow in the glutes for prolonged and vigorous workouts. This extra padding helps relieve pressure points of sitting and reduces the falling asleep feeling.

Learn more in my complete review below

Sunny SF-RBD4703 Recumbent Bike with Workstation
Sunny SF-RBD4703 Recumbent Bike with Workstation

Product: Sunny SF-RBD4703 Recumbent Bike with Workstation

Price: For a great deal on this bike, merely go here to

Warranty: Frame 3 years / Parts 90 days

My rating: 8.5/10

Affiliate Disclosure: As an Amazon Affiliate Program participant, I earn commissions on purchases made through links in this post. Full disclosure

Details and Specifications

  • Assembled dimensions: 52.8L x 23.6W x 53.5H inches (134L x 60W x 136H cm)
  • Desk dimensions: 15D x 22W inches (38L x 56W cm)
  • Assembled weight: 94.8 lbs (43 kg)
  • Supported weight: 350 lbs (159 kg)
  • Seat: Adjustable, with backrest
  • Pedals: With straps
  • Resistance: Magnetic, eight levels
  • Fitness console: Included
  • Other accessories: Tablet holder, bottle holder
  • Warranty: Frame 3 years / Parts 90 days

SF-RBD4703 Frame construction

The Sunny SF-RBD4703 recumbent desk exercise bike features very sturdy construction, all the parts in its frame being steel tubing. The cycle can support users up to 350 lbs (159 kg), which is impressive for a non-commercial model. The only plastic parts in its construction are the flywheel covers, the desk, and the base bars’ covers.

Sunny SF-RBD4703 Recumbent Bike with Workstation

Compared to other recumbent bikes, this exercise bike offers a slightly larger footprint and overall weight, which considerably improves its stability. Its assembled print measures 52.8″L x 23.6″W (134 x 60 cm), while the assembled weight is approx—99 lbs (43 kg). On top of that, the rear base comes equipped with adjustable stabilizers, so you can perfectly level it on any surface.

Although this bike is considerably more massive than the average road bike, its transport or relocation shouldn’t be too tricky once assembled. Its front base bar integrates two transport wheels, which facilitate its relocation.

Like many other Sunny Health & Fitness bikes, the Sunny SF-RBD4703 features a gray finish. This type of coating is resistant to corrosion and scratching. However, even though the paint is corrosion-resistant, the bike is meant for indoor use only.

By storing it and using it outside, moisture may eventually damage its internal components, or the screws and other parts may start to rust.


One of the best parts of the Sunny SF-RBD4703 recumbent desk exercise bike is its desk offers plenty of adjustabilities. It’s 4-way adjustable (up, down, front, back).

Its upright adjustment span is 3.75″ (9.5 cm), with a distance from the floor between 37.5″ – 41.25″ (95.2 – 104.7 cm). Its front to back adjustment span is 12″ (30.4 cm), with a distance from the seat’s backrest between 12″ – 24″ (30.4 – 60.9 cm)

The bike’s desk is a durable PVC material. Its surface integrates several anti-slippage, rubberized areas so that your laptop or tablet won’t slide over. Also, the desk’s user side is padded with a sheet of rubber foam to provide more comfort for your wrist while you work on your laptop. Plus, there’s a cup holder accessory attached to the side of the desk platform.

Sunny SF-RBD4703 Recumbent Bike with Workstation
Sunny SF-RBD4703 Recumbent Bike with Workstation

The whole desk platform is detachable from the handlebar. It doesn’t connect to the bike’s handlebar by any screws or bolts, so you can easily remove it if you want to use its multi-grip handlebar.

SF-RBD4703 Seat

The bike’s seat is also adjustable. It’s attached to a metallic frame, which supports users up to 350 lbs (159 kg). Its sliding rail is oblique, offering an adjustment span between 26″ – 33″ (66 – 84 cm) from the pedals. Thus, the bike can accommodate users between 5’0″ – 6’3″ (153 – 190 cm).

The seat and its backrest feature durable nylon upholstery and integrate a reasonably thick foam padding layer to deliver optimal comfort. The backrest has a contoured surface to provide excellent lumbar support.

The backrest does not adjust independently from the seat, though. It is attached directly to the same metallic bar as the seat and will move back and forth on its slider, along with the seat. It also doesn’t recline.

Resistance and drive

The Sunny SF-RBD4703 comes equipped with a manual magnetic resistance system. It consists of a magnetic pad connected via a steel wire to the lever on the front frame bar. By moving the lever up and down, the magnetic pad changes its position to the bike’s flywheel, which results in a pedal resistance adjustment.

There are eight resistance settings available. The first 1-3 settings offer a very light workout, while the top 7-8 settings can undergo a more intense workout. But as a general idea, this is not a bike for very fierce cardio training. To put it differently, it provides a light to medium workout, being a good choice for users who want to get some exercise while still getting some work done.

Sunny SF-RBD4703 Recumbent Bike with Workstation

This recumbent desk exercise bike comes with a belt drive. It uses a stretch-resistant, heavy-duty belt designed to last for many years of use. Since it’s a belt drive, it doesn’t require any lubrication. Also, the amount of noise generated during pedaling is almost nonexistent. So, you can use it in an office, for example, without bothering your colleagues.

The integrated flywheel is not extremely heavy. Its weight is not specified, but it usually weighs between 8 and 12 lbs for most bikes in this feature range. It’s perimeter-weighted, which means it delivers a smooth motion.

The bike’s crankset is quite durable, but it’s not made for spin workouts since this is a recumbent bike. Thus, it would help if you didn’t pedal while standing up.

The pedals equipped with the bike are durable nylon material. They have adjustable straps to prevent slippage, and they’re also weighted. They also have standard threads, so it’s easy to find replacements for them if needed.

Last but not least, this Sunny exercise bike features a narrow Q-Factor. This means that your feet are positioned correctly and naturally on the pedals, which results in no lateral stress on the ankles and knees.

SF-RBD4703 Console

The Sunny SF-RBD4703 comes equipped with a simple fitness console. It’s not programmable, doesn’t have online connectivity or other features. It has an LCD that tracks time, speed, calories, distance, and total distance.

It has a SCAN function that rotates all these values showing each one for four seconds, and it has a MODE button, which allows you to toggle the SCAN function ON and OFF. This way, you can select any of the mentioned values to be shown on the screen.

The MODE button also covers the unit’s reset function by pressing and holding the MODE button for 3 seconds.

Sunny SF-RBD4703 Recumbent Bike with Workstation
Sunny SF-RBD4703 Recumbent Bike with Workstation

The console is battery powered, and the required batteries come included with the bike. It starts when you begin pedaling or when you push the MODE button. It also features a sleep function into which it will enter after four minutes of inactivity on the pedals.

Finally, although the bike comes equipped with a whole desk accessory that can hold your laptop, the console itself also comes equipped with a tablet shelf. So, if you won’t be using the desk, you’ll still have a place to store your tablet or smartphone to keep yourself entertained while exercising.

SF-RBD4703 Assembly and Maintenance

The bike’s base frame with the resistance and drive elements comes pre-assembled. You will only have to add the bike’s front and rear base bars, the seat rail, the seat, the backrest, the handlebars upright adjustment bar, the handlebars, the console, the desk, and the pedals.

The assembly task is pretty easy; the manual provides all the instructions you need to do this yourself, without any professional help. Also, the bike comes with all the tools required for assembly. So, the whole task shouldn’t take longer than 30-40 minutes.

Maintenance is nonexistent. For this matter, you have to keep the bike free of dust and moisture and periodically check for loose bolts and parts. The internal components of the cycle shouldn’t require any greasing for an extended time.


  • Solid frame for a light recumbent bike, with a max. user capacity of 350 lbs;
  • Adjustable stabilizers on the rear base;

    Sunny SF-RBD4703 Recumbent Bike with Workstation
  • Transport wheels on the front base;
  • Step-thru frame design;
  • 4-way adjustable desk;
  • Large removable desk, with an anti-slippage surface and padding;
  • Adjustable seat – can accommodate users between 5’0″ – 6’3″;
  • Cushioned seat and backrest, for maximum comfort;
  • Quiet magnetic resistance system;
  • Adjustable resistance (8 levels);
  • Weighted pedals with adjustable straps and standard threads;
  • Fitness console that can track time, distance, total distance, speed, and calories;
  • Tablet holder integrated into the workstation;
  • Cup holder included;
  • Easy to assemble and operate;
  • Transport wheels and rear stabilizers;
  • Little to no maintenance is required.


  • No seat handlebars (or armrests);
  • A laptop will block the view of the bike’s LCD;
  • The LCD doesn’t have a backlight.

Sunny SF-RBD4703 Recumbent Bike Summary

The Sunny SF-RBD4703 is a recumbent bike featuring a durable and removable workstation, a comfortable seat, manual magnetic resistance, and a simple fitness console. It’s quite a sturdy fitness machine as it can support users up to 350 lbs.

Thus, it’s not a bike for intense cardio training but can help you bolster your heart rate while working on your laptop. Moreover, this can lead to a healthier cardiovascular system, toned muscles, improved stamina, and even weight loss. And finally, it’s not an expensive exercise bike, offering excellent value for the price.

2 thoughts on “Sunny SF-RBD4703 Recumbent Bike | Multitask While You Workout”

  1. I’d been looking at recumbent bikes or treadmills as a way to keep moving while working and avoid sitting for prolonged periods. This review is thorough, and I’m left feeling like the Sunny could be the ideal solution for me – or it would be if it weren’t so big! I may struggle to get that bad boy into my little home office!! Thanks for the review, though – it was comprehensive and informative. I appreciate that!


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