HITOSPORT S703B Indoor Cycle

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The HITOSPORT S703B is one of the indoor cycling bikes released in 2021. It’s a pretty standard bike made for home use. In terms of features, it can be compared with the RIF6 model. However, it has a slightly lighter flywheel and a fitness monitor with fewer functions.

Key Features and Specifications

  • Assembled dimensions: 40.5L x 19.6W x 43.3H inches (103L x 50W x 110H cm)
  • Flywheel weight: 35 lbs (15.8 kg)
  • Supported weight: 330 lbs (150 kg)
  • Seat: 4-way adjustable
  • Drive system: Belt
  • Resistance: Friction, felt pad
  • Fitness monitor: Time, speed, distance, total distance, calories, pulse, scan
  • Extras: Device holder, bottle holders

Frame construction

Like most other spin bikes, the HITOSPORT S703B indoor cycle features a frame made of steel tubing. Most of its frame tubes are oval; the only exceptions are the seat slider which is rectangular while the handlebar is made of a cylindrical and curved tube.

All the steel parts in the bike’s construction are coated with a corrosion-resistant paint finish. The main color used is black for all the versions of this bike. The only parts that combine different colors are the flywheel side panels and the drivetrain cover.

Although the bike is not foldable, it does have a fairly small footprint. It takes approx. 40.5″L x 19.6″W (103 x 50 cm) of floor space. It is recommended, though, to allow at least a few feet of clearance all around it for ease of access and safe usage.

The bike is not too heavy either. Its exact net weight is not specified, but similar other bikes weigh approx. 70 lbs (31.7 kg). This being said, the bike can be carried and assembled by only one person. Plus, once the bike is assembled, it can easily be moved as its front base integrates transport wheels.

Last but not least, the bike’s base bars are equipped with adjustable levelers. These have large rubber pads for an improved grip on the floor. Also, the bike’s center of gravity is pretty low, so it shouldn’t move or wobble even if you engage in a more demanding workout.

Seat and handlebars

The HITOSPORT S703B indoor cycle includes a saddle designed for superior comfort. To begin with, it is approx. 11″ (27 cm) long, and 8″ (20 cm) wide so it provides more contact surface and comfort. It has a thick layer of internal cushioning and a durable vinyl cover. It also has a median groove for improved breathability.

The seat is four-way adjustable (front, back, up, down). Its upright post has 6 adjustment positions and offers an adjustment span between 31.8″ and 38.1″ (81 – 97 cm). Plus, its horizontal slider adds several inches of front-to-back adjustment. These being said, the bike should be able to accommodate comfortably users between 5’0″ and 6’5″ (153 – 196 cm). It is also rated for a maximum weight capacity of 330 lbs (150 kg) which is not bad for an exercise bike made for home use.

The bike’s handlebar has a multi-grip design. It offers the possibility to adopt a climbing grip, an off-road grip, and a standard grip. It also has a small loop bar in the middle which allows a close grip, but only in case you don’t attach the fitness monitor.

Unlike the seat, the bike’s handlebar is only two-way adjustable (up, down). It does not have a horizontal slider like the seat. It offers an adjustment span of approx. 4″ (10 cm), between 39.3″ (100 cm) and 43.3″ (110 cm) above floor level. Its side grips integrate metallic pulse sensors and the fitness monitor does have a pulse reading function.

Resistance system

The HITOSPORT S703B indoor cycling trainer is equipped with a manual friction resistance system. This being said, you don’t need to connect it to a power outlet and you don’t need an adapter or power cord for it. But on the other hand, the bike cannot adjust the resistance automatically like the more expensive model.

The bike’s resistance system consists of a felt pad attached to the main tube of the frame and concealed by a large plastic cover. The bike’s tension knob is connected to this pad, so if you turn it to the right, the pad applies more friction to the flywheel which adds difficulty to the ride. Conversely, if you turn the tension dial counterclockwise, the brake pad moves away from the flywheel and the friction is reduced offering an easier pedaling difficulty.

The tension dial also works as an emergency brake. You can press it all the way down to stop the flywheel from spinning. This is actually quite necessary especially if you’ve been pedaling at a high speed as trying to stop the pedals and flywheel with your feet can result in an injury.

It’s also important to mention here that the bike’s brake pad will wear out after a while and will need replacement. However, the included one should last for at least a year even if the bike is used on a daily basis. Also, if the brake pad squeaks when in contact with the flywheel, a bit of silicone lubricant applied on the edge of the flywheel should take care of the problem.

Drive system

First of all, the HITOSPORT S703B is equipped with a 35 lbs (15.8 kg) flywheel. It’s a bit lighter than for other indoor cycling bikes, such as the Sunny SF-B1876, or the Yosuda L-007A. However, it has the same perimeter-weighted design which is meant to provide superior inertia for a more consistent pedaling motion.

The flywheel is bi-directional; in other words, you can pedal in reverse on this bike. But since its drive system is simpler than the one of a road bike, you cannot coast on it. Also, when you backpedal, the resistance remains constant, given the amount of friction the brake pad applies on the flywheel.

The bike is equipped with a heavy-duty, 3-piece crankset featuring oval arms similar to road bikes. The pedals are made of aluminum alloy so they should withstand spin workouts and standing on them with no problem. They do not have SPD clips for spin shoes, but they do have adjustable toe cages.

The S703B exercise bike features a belt drivetrain; it is equipped with a poly-v belt, highly resistant to abrasion. As opposed to a chain drive, the belt drive system comes with several advantages. First of all, it generates less vibration so the bike delivers a very smooth and quiet pedaling motion. And second of all, it does not require lubrication.

Fitness monitor

The HITOSPORT S703B indoor cycling bike is equipped with a basic fitness monitor, similar to the one included with the HARISON Sharp X1. It tracks time, speed, distance, total distance, calories, and pulse. Speed and distance are shown in metric units (km/h and kilometers) and there is no option for setting them to English units. The pulse reading function is grip only. Thus, you need to hold on to the integrated sensors so that the monitor can track your pulse. It cannot read your pulse from a wireless transmitter.

The monitor unit does not have pre-set programs, goal settings, or online connectivity. It only has one button. By pressing the button repeatedly, you can scroll through the workout metrics and select the one you want to view on the display. It also has a Scan function which you can select in the same way. In Scan Mode, the monitor rotates all the values showing each one for a few seconds.

The button also covers the unit’s reset function. You can press and hold it for a few seconds to clear all the metrics to zero. The only value that won’t be deleted is the odometer.

The monitor unit is battery-powered. It requires two AAA batteries. It starts up when you begin pedaling, and also automatically turns off if it does not detect any activity on the bike for more than 4 minutes.

Assembly and Maintenance

The bike’s main body comes pre-assembled. The flywheel, the brake, the crankset, and the belt are already attached to the bike with all their covers. You only have to connect the bike’s base stabilizers, the pedals, the seat, the handlebars, the fitness monitor, and the device holder. This shouldn’t take more than 30-40 minutes of your time. All the necessary tools are included and the manual provides clear assembly instructions.

For maintenance, it is recommended to keep the bike clean and wipe the sweat that may drop on the frame at the end of the workout. The brake pad may require a bit of silicone lubricant in case it generates noise when in contact with the flywheel. It is also recommended to periodically inspect the bike to make sure that all the parts hold tight in their places and still function properly.

The Pros

  • Durable steel frame – can support users up to 330 lbs;
  • Aesthetic design;
  • Transport wheels on the front stabilizer;
  • Adjustable levelers on both base stabilizers;
  • Aluminum alloy pedals with toe cages;
  • Multi-grip handlebar with pulse sensors;
  • Multi-purpose accessory tray included;
  • 4-way adjustable seat;
  • Maintenance-free belt drive;
  • Heavy, 35-lb flywheel, with a perimeter-weighted design for enhanced inertia;
  • Basically limitless resistance settings;
  • Fitness monitor included – it tracks time, distance, total distance, speed, calories, and pulse;
  • Little maintenance required;
  • Easy to assemble;
  • All the tools required for the assembly are included.

The Cons

  • No backlight on the fitness monitor display;
  • No online connectivity;
  • No RPM reading function.


The HITOSPORT S703B is an indoor cycling bike made for home use. It features a 35-lb flywheel, a friction resistance system, a 4-way adjustable seat, and a fitness monitor that tracks all the important workout metrics. It also includes a multi-purpose accessory tray. In all, it’s a fairly decent exercise bike, great for high-intensity cardio workouts, muscle toning, stamina and strength development, and weight loss.

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