| Unit | Size | Supported weight | Resistance | Drive system | Console programs |
|---|---|---|---|---|---|
Stamina 845 Check Discounted Price | L:51.1" W:23.6" H:46.3" | 250 lbs | Eddy current, 16 levels | Belt | 1 manual, 12 pre-set, 4 HRC, 1 Watt, Recovery, BMI, Goals |
The Stamina 845 is one of the recumbent bikes released in 2020. Although it’s an exercise bike made for home use, it offers superior comfort factors and a fairly decent range of workout programs. In terms of features, it can be compared to the Sunny Health & Fitness SF-RB4850. However, it’s quite a bit more expensive than the Sunny model.
Key Features and Specifications
- Assembled dimensions: 51.1L x 23.6W x 46.3H inches (130L x 60W x 118H cm)
- Assembled weight: 96 lbs (43.5 kg)
- Supported weight: 250 lbs (113.3 kg)
- Resistance: Motorized magnetic, 16 levels
- Drive: Dual belt
- Console programs: 1 manual, 12 pre-set, 4 heart rate, 1 watt, body fat, recovery
- Extras: Device holder, bottle holder
- Warranty: Frame 3 years / Parts 90 days
Frame construction
The Stamina 845 recumbent exercise bike features a one-piece base frame with a step-through design. This
particular construction can be quite a plus for users with certain disabilities as it considerably facilitates entry and exit, as the user does not have to step over the drive unit. Not all recumbent bikes have this feature.
The bike’s frame is made of rectangular and cylindrical steel tubing double-coated with a corrosion-resistant paint finish. The color used is black, this being the only color available for this Stamina exercise bike.
Of course, the bike also integrates several thermoplastic parts in its construction. The most notable ones are the covers of the drive and resistance elements, the backrest’s frame, and a few other small covers.
The fully assembled bike is not extremely large compared to other fitness machines. However, it still is approx. 51.1″ (130 cm) long, and 23.6″ (60 cm) wide. Plus, it is recommended to leave at least two feet of clearance on each side, and at least one foot at the front and rear, for ease of access and unhindered usage.
The bike is pretty heavy as well. Its net weight is 96 lbs (43.5 kg). Thus, the packaged unit should be carried by two persons or by the means of a box carrier. Once it is assembled, it can easily be moved by only one person as its front stabilizer bar integrates two small wheels, while the rear base stabilizer features a small lifting handle.
Seat and handlebars
The Stamina 845 is equipped with a large seat designed for superior comfort. It is actually pretty similar
to the construction of certain office chairs. Its bottom pad integrates a thick layer of foam padding and has a durable faux leather cover which is also sweatproof and easy to maintain.
The seat assembly features a mesh-type backrest with a frame made of a durable thermoplastic material (probably polypropylene). Its frame is contoured and slightly flexible so it can adapt to the shape of your body. Also, the mesh structure provides excellent breathability.
The seat is adjustable. It is attached to an oblique rail and you can secure it closer or farther from the pedals. The seat adjustment system is lever-based, which is quite a plus because you can adjust the position of the seat without having to get up. There is a lever on its right side that allows you to unlock it and re-lock it in the desired position.
The seat adjustment span should be enough for users between 5’0″ and 6’3″ (153 – 190 cm). It is also rated for a maximum user weight limit of 250 lbs (113 kg).
It’s important to mention, though, that the backrest cannot be adjusted independently from the rest of the seat. It attaches to the seat frame via several screws. Therefore, it doesn’t recline and does not have an up/down adjustment slide as is the case for the Tunturi E80-R, for example.
The Stamina 845 recumbent bike is equipped with two sets of handlebars. One is attached to the front mast of the bike, the other to the seat assembly. The front handlebars offer the possibility to adopt several grips. They are covered by a layer of high-density foam material for a comfortable and secure grip. Also, due to the curvature of the front mast, they are pretty close to the user, so if you exercise by holding on to them, your position is not awkward and uncomfortable as is the case for other recumbent bikes.
The seat handlebars feature the same foam covers as the front handlebars. However, they integrate metallic pulse sensors. Thus, by holding on to them, the console can monitor your heart rate. None of the handlebars are adjustable.
Drive and resistance
The Stamina 845 recumbent bike is equipped with a dual belt drive system. This means it has two internal 
belts and two pulleys. This type of drive system adds stability and consistency to the ride. It also improves the overall pedaling resistance. And since the bike uses belts for its transmission, you don’t have to worry about their lubrication, as it would be the case for a bike with a chain drive.
The bike’s internal flywheel is perimeter-weighted. This type of construction improves inertia. Its exact weight is not specified, but considering the overall weight of the bike, it should be around 20 lbs (9 kg). It is also bi-directional. In other words, the bike allows pedaling in reverse.
The bike comes with a set of two standard exercise bike pedals. They have a weighted design in order to always self-level if you remove your feet from them. They also have adjustable straps so you can secure your feet on them if necessary.
The Stamina 845 recumbent bike features a motorized magnetic resistance system. This means that it requires an external power source to power up the console and make possible the resistance adjustment. It comes with an adapter (9V, 500 mA).
The bike’s resistance system consists of a servo motor and a magnetic brake. The servo motor is connected to the console and the brake. Therefore, when you adjust the resistance, the motor changes the magnets’ pull, increasing or decreasing the pedaling load.
The bike offers 16 levels of resistance. The 1-3 difficulty levels offer light resistance, great for recovery training or a light warm-up. The 7-10 levels are great for toning leg muscles and improving strength and stamina. And finally, the 10-16 levels allow you to achieve a higher calorie burn and an increased cardiovascular rate in a shorter period of time.
Console
The Stamina 845 is equipped with a mid-range console. It features a multi-window LCD display with 
blue LED backlight for improved readability. It tracks time, speed, RPM, distance, calories, watts, and pulse. Speed and distance are shown in English units (mph and miles). The pulse reading function is grip contact only. In order for the console to read your pulse, you have to hold on to the sensors integrated into the seat handlebars. The console cannot read pulse from a wireless transmitter.
The bike’s console does not have Bluetooth and is not compatible with any fitness apps. However, it has a pretty decent built-in program database. To begin with, it has a Manual Mode which allows you to adjust the resistance as you like during the workout. Next, there are 12 pre-set programs that you can choose from. These adjust the resistance automatically. They have different layouts and cover various types of workouts. And finally, there 4 heart rate programs, three pre-set for 55%, 75%, and 90% heart rate, while the fourth is custom.
The console offers target setting functions for time, distance, calories, and watts. If you select a target for time, distance, and calories, it will count down from the selected value until you reach zero and complete your current goal. The watt target is a bit different. If you choose a watt target, the console will automatically adjust the resistance in order to keep you close to the selected target watt.
A Body Fat function and a Recovery function are also available. These have quick access keys on the console. The Body Fat function calculates your Body Mass Index based on your data input (age, gender, height, weight). The Recovery function counts your pulse at the end of the workout and determines your fitness level rating it between F1 – excellent, and F6 – poor.
Assembly and Maintenance
The main body of the bike comes with the drive and resistance unit, comes pre-assembled. However, the rest of the parts do require user assembly. You will basically have to attach the front and rear frame stabilizers, the pedals, the front mast, the front handlebars, the console, the seat, and the backrest. This may take up to two hours but the task is not too complicated. Plus, the manual provides clear, step-by-step instructions and schematics and all the necessary tools are included.
For maintenance, you only have to keep the bike clean and wipe the sweat that may fall on the frame at the end of your workout. The internal parts do not require lubrication. It is also recommended to periodically inspect the bike to make sure that all the parts are functioning properly, and all the bolts hold tight in their places.
The Pros
- Sturdy construction – can support users up to 250 lbs;
- Elegant design;
- Large cushioned seat with flexible mesh backrest;
- Two sets of handlebars;
- Pulse sensors integrated into the seat handlebars;
- Weighted pedals, with adjustable straps for extra stability;
- Motorized magnetic resistance – 16 levels;
- Multi-function console with a backlit LCD display;
- 12 pre-set programs;
- 4 HRC programs;
- 2 user profiles;
- Body Fat and Recovery functions;
- Goal settings for time, distance, watts, and calories;
- Device holder included;
- Bottle holder included;
- Basically maintenance-free;
- Easy to assemble;
- All the necessary assembly tools are included;
- Excellent warranty.
The Cons
- No online connectivity;
- No Bluetooth function;
- A tablet placed on the device holder may cover the console display.
Summary
The Stamina 845 is a recumbent bike made for home use. It is equipped with a 16-level motorized magnetic resistance system, a high-comfort seat, and a console with multiple workout programs. It’s an exercise bike for users of all levels, for light to intense cardio training, recovery training, muscle toning, stamina development, and weight loss.