Sunny Health & Fitness SF-B1805 Indoor Cycling Bike Review

One big concern you might have while searching for an indoor bike will be- safety and reliability. And if you are looking for one such reliable exercise bike, then here is a worthy suggestion for you- the Sunny Health & Fitness SF-B1805 indoor cycling bike.

This exercise bike comes with a premium build quality that ensures safety, durability, and ultimately, greater comfort. Also, the ergonomic design makes it a great piece of workout equipment for an entire family. 

So, if you wish to learn more about this highly trusted spin bike, here is an honest, in-depth review of the same. So, read along, and decide by yourself whether the Sunny Health & Fitness bike is what you have been looking for or not.

Sunny Health & Fitness SF-B1805 spin bike Review 

The most desirable feature of the Sunny Health & Fitness SF-B1805 stationary bike is its strong, durable frame. And due to such a thick alloy steel frame, this stationary bike weighs a massive 125 Pounds. That makes it much heavier than most other indoor bikes in this price range. 

And thanks to the heavy frame and stronger stabilizers given on both the rear and front sides, you won’t have to worry about your safety while spinning. 

Sunny Health & Fitness Magnetic Belt Drive Indoor Cycling Bike with 44 lb Flywheel and Large Device Holder, Black, Model Number: SF-B1805

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Additionally, the 44 Pounds flywheel gives extra stability while riding. The heavy flywheel, in addition to contributing towards stability, combines with the advanced magnetic resistance pad to offer you adjustable resistance. 

That means, with the Sunny Health & Fitness SF-B1805 indoor bike, you can create real outdoor biking experiences within the comfort of your home. 

Another feature worth mentioning about this Sunny Health & Fitness spin bike is its customizability. You can adjust the seat and handlebars in both vertical and horizontal directions. 

That means, you can select between the inseam height range of 28-38 inches, and a seat-to-handlebar distance range of 17-21 inches

Thanks to such diverse adjustability, this indoor bike can suit both short and taller individuals. To make sure this bike suits you, do measure your inseam height, and check whether it comes within the range. 

Another mentionable feature of this spin bike is the belt drive they’ve used instead of the conventional chain drive. Due to this, not only will you have to do considerably less maintenance, but also you can have a quieter, smoother indoor cycling experience. 

Conversely, one thing you should keep in your mind is that this Sunny Health & Fitness spin bike doesn’t have a live performance monitor. That may come as quite an issue, especially if you are planning to keep track of your cycling progress. 

But as you may know, performance monitors of most other bikes are hardly found accurate or helpful. 

And, if you are planning to use some fitness app, or want to install your own device to track your performance, you can place the device on the device holder provided with the bike. The device holder is placed above the handlebars, and it will be easier for you to use your tablet, smartphone, or any other devices that you use instead. 

Other facilities with this Sunny Health & Fitness bike include protection cages for the pedals, mobility wheels to move the bike around, and a water bottle holder. 

Features & Specs

Here is a table with all the key features and specifications of the Sunny Health & Fitness SF-B1805 spin bike. So, have a quick look before proceeding further to the detailed review. 

Features & Specs


Sunny Health and Fitness






Alloy steel


48 x 23 x 45 inches

Maximum inseam height

38 inches

Minimum inseam height

28 inches

Weight Capacity

300 Pounds

Product Weight

125.7 pounds


44 Pounds

Adjustable resistance


Type of resistance

Magnetic resistance

Seat dimensions

10 x 8 x 3 inches (LWH)

Seat adjustability

Yes (horizontal and vertical)

Handlebar adjustability

Yes (horizontal and vertical)

Handlebar- seat distance

Minimum: 17 inches

Maximum: 21 inches

Pedal style

Caged pedals

Drive system

Belt drive

Performance monitor


Device holder


Water bottle holder


Moving wheels



3 year for frame

6 months free replacement for other parts


In order to ensure safety, spare a space of at least 2 feet around the bike. And the floor should have a decent surface, preferably carpeted, so that the bike will stay extra stable. 

Build Quality

The Sunny Health & Fitness SF-B1805 indoor cycling bike is designed ergonomically and manufactured with premium build quality to give you memorable indoor cycling experiences.

Given below is where the bike stands in terms of build quality. 


The frame of this Sunny Health & Fitness stationary bike is made of extra strong alloy steel. The frame is also heavier than that of most other indoor bikes; as a result, it weighs a massive 125 Pounds. 

Thanks to such a heavy frame, the bike can withstand a weight of up to 300 pounds. And that’s a not-so-bad number for an indoor bike. 

Therefore, unless you are very heavy, you are truly safe to ride this bike. 

Sunny Health & Fitness Magnetic Belt Drive Indoor Cycling Bike with 44 lb Flywheel and Large Device Holder, Black, Model Number: SF-B1805

Flywheel and Resistance 

If you feel like the heavy frame is not sufficient, then here is the 44 Pounds Flywheel. 

The 44 Pounds flywheel of the Sunny Health & Fitness SF-B1805 exercise bike offers great inertia and thus, will give you greater stability while biking. 

Combining with the Flywheel is the magnetic resistance pad that lets you pedal against adjustable levels of resistance. The magnetic resistance pad is designed and engineered with utmost care.

Also, unlike the conventional frictional brake pad, the magnetic pad is far more efficient, durable, and most importantly, comfortable.


Speaking of the pedals of the Sunny Health & Fitness SF-B1805, they come with sufficient strength to withstand loads of up to 300 Pounds. They are likely made of aluminum, which makes them strong and light in weight simultaneously. 

Additionally, the pedals are placed within protection cages that will protect your feet from fast rides and other mishaps. 

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The handlebars of this Sunny Health & Fitness indoor cycling bike are bigger, and more adjustable than most other spin bikes. It is strong enough to suit varying riding styles. Hence, you won’t feel wobbling or any such issues, unless you weigh 300 Pounds. 

In addition, the handlebars have a rubber coating at the top, making it more comfortable for you to hold them. 


The seat of the Sunny Health & Fitness SF-B1805 bike comes with a dimension of 10 inches length, 8 inches width, and 3 inches height. We have no opinion that the seat of this bike has the greatest possible dimensions, but it can do the job for you. 

Furthermore, the seat is specially designed for longer rides. For instance, it has a thicker cushion, and a hole to distribute the load further.   

Sunny Health & Fitness Magnetic Belt Drive Indoor Cycling Bike with 44 lb Flywheel and Large Device Holder, Black, Model Number: SF-B1805


Here is how Sunny & Health used technology while designing this exercise bike. 

Flywheel and Resistance

The 45 Pounds flywheel and the advanced magnetic resistance are among the most notable features of the Sunny Health & Fitness SF-B1805 indoor cycling bike.

Using the magnetic resistance technology of this spin bike, you can imitate real-outdoor cycling conditions from the comfort of your home. That means, you can enjoy the feel of pedaling in flat terrain, or that of going up a hill, riding down the hill, and dozens of resistance levels in between. 

In other words, the magnetic resistance is micro-adjustable. You can adjust it easily by using the knob given right within your arm’s reach. 

To increase the resistance, turn it clockwise. And to decrease it, turn it anticlockwise. 

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This Sunny Health & Fitness indoor bike is greatly customizable. Both the seat and the handlebars are adjustable in 4 ways; that is, vertically as well as horizontally.

In short, you can customize the bike in terms of:

  • Seat height
  • Handlebar height
  • Seat – handlebar distance

Sunny Health & Fitness Magnetic Belt Drive Indoor Cycling Bike with 44 lb Flywheel and Large Device Holder, Black, Model Number: SF-B1805

Belt Drive 

The Sunny Health & Fitness SF-B1805 uses a belt drive instead of the conventional metallic chain drive.

As a result, your indoor cycling sessions will be even quieter and smoother. 

Another advantage of the belt drive is that it needs no maintenance compared to the metallic chain drive.

Assembly and Maintenance

Assembling the Sunny Health & Fitness SF-B1805 indoor bike is not supposed to be tedious. 

First of all, grab the instructions manual and the toolbox that arrive with the package. 

The frame, flywheel, and some other parts will already be connected together when it reaches you. All you have to do is to connect the other parts. Their instructions manual is very clear, and you can simply follow them to assemble the bike.

Assembling the Sunny Health & Fitness exercise bike will take you a maximum of 45 minutes. Although they offer expert assembly at some locations, we suggest you do it yourself, as it is not a hard job. 

However, as the machine is heavy, it will be better if you have someone to help with moving the package.

Now, speaking of the maintenance, you need to take proper care of the bike to ensure smoother operation and better life.

Daily maintenance: 

  • Clean the frame, drive cage, handlebar, seat, and other key parts, and get rid of sweat and other dirt. 
  • Make sure the pedals are well connected, and the screws are intact. 

Weekly maintenance:

  • Inspect all screws, fasteners, and connectors. Make sure they are perfectly connected and in shape. In case of any damages, go for immediate replacement.
  • Make sure the seat is perfectly leveled.
  • Lubricate the pop-pin assemblies for a smoother operation.

Monthly maintenance:

  • Do a detailed inspection of all nuts and bolts, and ensure they are well connected. Make sure the bottle holder is also in position.
  • Inspect the brake pad. Look for any damages or presence of foreign particles. Clean the pad thoroughly, preferably after taking it out. 
  • Clean and lubricate the seat post and handlebar post.

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Aesthetics and Styling 

Basically, the Sunny Health & Fitness SF-B1805 indoor bike has a simpler appearance. Along with black as the major color, a few other parts like the flywheel and the posts come with the common silver color.

Additionally, they’ve used red circles to give some style to the flywheel and the pedal cage. Finally, the brand name, ‘sunny’ is labeled in the frame. 

So, aesthetically, the bike is an average performer, and the manufacturers decided to make it simpler. 

Sunny Health & Fitness Magnetic Belt Drive Indoor Cycling Bike with 44 lb Flywheel and Large Device Holder, Black, Model Number: SF-B1805

Pros & Cons 

So far, we’ve discussed with you various features of the Sunny Health & Fitness SF-B1805 spin bike. Now, here are some notable pros and cons of this indoor bike that you should keep in your mind before making your buying decision.


  • 44 Pounds flywheel
  • Decent inseam height range
  • Adjustable magnetic resistance
  • Highly stable
  • Comfortable handlebars
  • Good build quality
  • Easy assembly
  • Stronger frames


  • No performance monitor
  • Comparatively heavier 


Is Sunny Health & Fitness SF-B1805 spin bike Worth The Buy? 

Considering all those features, especially the finest build quality, we do believe the Sunny Health & Fitness SF-B1805 stationary bike is worth the buy.

It suits people of different heights (from short to very tall individuals), thanks to the impressive inseam height range of 28”/38”, and heavier individuals of weights of up to 300 Pounds.

The most notable feature of this spin bike is the quality of manufacturing that ensures safety and durability. In addition, the presence of magnetic resistance technology and a belt drive system makes your indoor cycling sessions even smoother and quiet. 

However, if you are a fan of live performance monitoring, and don’t wish to buy a performance tracker separately, then you better look for some other indoor bikes . Because this bike doesn’t have an in-built performance monitor. (Note: you can buy one easily)

Otherwise, this spin bike has all it takes to be your long-term fitness partner. 


That was a detailed review of this popular Sunny Health & Fitness spin bike focusing on all major pros and possible drawbacks. Overall, we are impressed with this exercise bike.

So, what do you think about this indoor bike? Feel like you found your ideal fitness partner in the Sunny Health & Fitness SF-B1805 exercise bike? If so, then waste no time, buy this spin bike as soon as possible, and be on your fitness journey right away. 

Because when it comes to fitness, starting late is itself a great crime.