Sunny Health & Fitness AeroPro SF-B1711 Indoor Cycling Bike

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Sunny AeroPro SF-B1711

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The AeroPro SF-B1711 is one of the indoor cycling bikes released by Sunny Health & Fitness in the second part of 2019. It’s a heavy-duty exercise bike designed to support any spin workout. Also, even though it’s equipped with a magnetic resistance system, it also has an extra-heavy flywheel for superior inertia.

Key Features and Specifications

  • Assembled dimensions: 49L x 22W x 45.5H inches (124L x 56W x 115H cm)
  • Assembled weight: 117 lbs (53 kg)
  • Flywheel weight: 44 lbs (20 kg)
  • Supported weight: 300 lbs (136 kg)
  • Seat: 4-way adjustable
  • Drive system: Belt
  • Resistance: Magnetic
  • Fitness meter: Not included
  • Extras: Tablet holder, bottle holder
  • Warranty: Frame 3 years / Parts 180 days

Frame construction

The Sunny Health & Fitness SF-B1711 indoor cycling bike features a frame construction similar to the pooboo D686. It’s still a triangular frame, but the longitudinal base bar connects to the main frame at the base of the crank, rather than the rear base. Nonetheless, the bike’s frame is made of durable steel tubing and coated with a thick, rust-resistant paint finish. The color used is light gray, this being the only color available for this Sunny exercise bike. The only exceptions are the seat post and slider, the handlebar post, and the flywheel, which have a shiny chrome finish.

Like most other spin bikes, the Sunny SF-B1711 is not an extremely large fitness machine. It is approx. 49″ (124 cm) long, and 22″ (56 cm) wide, so it can fit even into a smaller room. It is recommended, though, to leave at least 24″ (61 cm) of clearance all around it for safe usage and ease of access.

Given the extra-heavy flywheel and the thick, durable steel tubing, the SF-B1711 is quite a heavy trainer. Its net weight is 117 lbs (53 kg), which is three times the weight of the average road bike. All this weight provides super stability. Plus, both base bars of the unit has adjustable stabilizers with rubber pads.

Despite its weight, the bike can easily be moved by only one person once it is fully assembled. Its front base features a set of large silicone wheels which considerably ease its relocation.

As opposed to the pooboo D686 that we’ve already compared it with, the Sunny SF-1711 features a small horizontal bar that unites the seat tube with the main oblique tube. This bar can be used as a step-up element or as support for stretching. It can be also used for certain exercises during various spin workouts. Not all spin bikes have this element, so it’s quite a plus.

Last but not least, not all parts of the bike’s construction are made of steel. The belt cover and the side panels of the flywheel are made of ABS plastic. But nonetheless, they only have a protective role, so by any means they don’t diminish the bike’s overall sturdiness or weight capacity. The SF-1711 bike is rated for a maximum user weight limit of 300 lbs (136 kg).

Seat and handlebars

The Sunny Health & Fitness AeroPro 1711 indoor cycling bike includes a high-comfort saddle. It’s a fairly slim race-type saddle, 7.5″ (19 cm) wide, and 11″ (28 cm) long, but integrates a thick layer of foam cushioning, especially in its rear section. Plus, it has a longitudinal groove which considerably improves breathability during seated workouts.

The seat attachment system is collar-based. Therefore, in case you will ever need to replace it, compatible options should be widely available in any bike shop.

The bike’s seat is four-way adjustable (up, down, front, back). Its upright post has multiple adjustment positions while its horizontal slider adds several inches of fore/aft adjustment. This being said, the bike can accommodate users with an inseam between 27″ and 39″ (68 – 99 cm). In other words, it should accommodate users between 5’1″ and 6’6″ (155 – 198 cm) allowing a complete leg extension and range of motion.

The bike has a handlebar similar to the pooboo D770 but without pulse sensors and exercise meter. It features a multi-grip design allowing a climbing grip, a standard grip, a close grip, and a drop-down grip. Also, the two median bars offer the possibility to adopt an aero grip. The whole handlebar is urethane-coated for an improved and comfortable grip.

As opposed to the seat, the handlebar is only two-way adjustable (up, down). It does not have the horizontal slider. Both the seat and the handlebar are very easy to adjust. They feature large knobs, easy to grip, and turn.

Resistance system

The Sunny Health & Fitness AeroPro SF-B1711 indoor cycling bike is equipped with a manual magnetic resistance system. This means you don’t have to connect it to a power source and you don’t need an adapter or power cord for it. But on the other hand, the resistance can only be adjusted manually; the bike cannot automatically adjust the resistance, and it does not have a console with workout programs.

The bike’s resistance system consists of a magnetic brake placed above the flywheel and connected to the tension knob above the main oblique frame tube. By turning the knob clockwise, the brake moves closer to the flywheel increasing the magnetic pull which adds pedaling difficulty.

The bike’s brake is stepless. This means the tension knob doesn’t have clicks or pre-determined resistance levels. You simply turn it until you get the desired pedaling difficulty. As a general idea, the maximum resistance level is pretty tough. Even a fit user may not be able to maintain a high pedaling speed when using it for more than a few minutes.

The tension knob also has an emergency brake function. You can press it down to stop the flywheel instantly. This is actually necessary because the bike has a very heavy flywheel and the pedals continue to spin for as long as it is spinning. So, trying to stop it from the pedals may lead to injuries.

Drive system

First of all, just like most other exercise bikes or ellipticals equipped with a magnetic brake, the Sunny AeroPro SF-1711 features a belt drivetrain. It uses a heavy-duty, poly-v belt resistant to stretching and abrasion. This type of drive system comes with several advantages. First of all, the belt does not need lubrication, so this saves you quite a bit of hassle. Second of all, a belt drive generates less vibration than a chain, and third of all, it contributes to the overall quietness of the pedaling motion.

Since it’s a bike designed for spin workouts, the Sunny SF-B1711 is equipped with a solid 3-piece crankset. Its arms are made of solid steel while the pedals are also metallic. This being said, as long as you don’t exceed the 300 lbs (136 kg) weight limit, you should be able to pedal while standing up with no problem.

The pedals are dual-sided. They have adjustable toe cages on one side and SPD elements for spin shoes on the other. But nonetheless, they have 9/16 standard threads, so in case you will ever want to replace them, compatible options are widely available.

The Sunny AeroPro SF-1711 indoor cycling bike is equipped with an extra-heavy flywheel. It weighs 44 lbs (20 kg) while most other bikes in this feature range only have flywheels up to 40 lbs (18 kg). The flywheel is perimeter-weighted for enhanced inertia which is great for spinning. This being said, even if the resistance is set to minimum, the bike still provides a very consistent and smooth pedaling motion.

The bike’s flywheel is bi-directional. Differently put, you can pedal in reverse. However, coasting (or free-wheeling) is not possible on this bike. When pedaling in reverse, you will benefit from the same pedaling difficulty as when pedaling forward, depending on the selected tensions level.

Other accessories

Unfortunately, the Sunny Health & Fitness SF-B1711 bike does not include an exercise meter. Therefore, in case you want to track your workout metrics and your progress, you will have to use a separate device.

Two notable accessories included with this Sunny exercise bikes are the bottle holder and the tablet holder. The bottle holder attaches to the bike’s front fork bar on the right. It’s metallic and flexible, so it can accommodate most hydration bottles. The tablet holder is integrated into the handlebar, between the two median aero bars.

Assembly and Maintenance

Most of the bike comes pre-assembled. You only have to attach the two base bars, the pedals, the seat slider, the saddle, the handlebar post, and the handlebar. This shouldn’t take more than 20 minutes of your time. The manual provides all the necessary instructions accompanied by schematics, and all the tools for assembly are included.

Once the bike is fully assembled, you don’t have to worry much about maintenance. As we’ve mentioned above the drivetrain doesn’t require any lubrication. So, basically all you need to do is keep the bike clean and periodically check for loose parts.

The Pros

  • Sturdy construction can support users up to 300 lbs;
  • Aesthetic design;
  • Adjustable stabilizers on both bases;
  • Transport wheels on the front base;
  • 4-way adjustable seat;
  • High-comfort saddle with foam cushioning and a median groove for extra breathability;
  • Multi-grip handlebar with aero and drop-down grips;
  • Step-up bar between the seat tube and the main tube of the frame;
  • Smooth, almost silent belt drive;
  • Extra-heavy 44 lbs flywheel
  • Frictionless magnetic resistance;
  • Heavy-duty metallic pedals with toe cages and SPD compatible;
  • Tablet holder included;
  • Bottle holder included;
  • Tools for assembly are included;
  • Easy to assemble;
  • Little maintenance required;
  • Excellent warranty.

The Cons

  • No pulse reading function;
  • No exercise meter.


The Sunny Health & Fitness AeroPro SF-B1711 is an indoor cycling bike designed for home use. It is equipped with a frictionless magnetic resistance system, and extra-heavy (44 lb) flywheel, and a high-comfort, 4-way adjustable seat. It’s definitely a bike made to withstand any spin workout, great for intense cardio training, interval training, muscle toning, stamina development, and weight loss. It’s not exactly one of the most affordable Sunny exercise bikes and does not come with an exercise meter, but definitely offers excellent value for the price.

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