Synergy Pro Magnetic Indoor Cycling Bike

Limited Offer
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike
Synergy Pro Magnetic Indoor Cycling Bike

Synergy Pro Magnetic Indoor Cycling Bike


340 reviews

Regular price

List Price:

Sale price $643.48 Save $356.51

2277 in stock

flywheel icon

Performance Monitor

Monitor icon

40 lb Flywheel

sturdy frame icon

300 lb Weight Capacity

magnet icon

Caged/SPD Compatible Pedals

Why the Synergy Pro?

Start a new in-home fitness routine with the SF-B1851 Synergy Pro Magnetic Indoor Cycling Bike. The Synergy Pro bike is one of the most advanced Sunny indoor exercise bikes. Ergonomically designed, this bike has a rounded multi-grip handlebar and 4-way adjustable seat that can help maintain your comfort and stability while you exercise. Cycling on an indoor bike is a low-impact exercise that can strengthen your cardiovascular performance and engage muscles in your arms, core, and legs.

The highlight of the Synergy Pro is its exclusive innovative patented flywheel design based on Sunny's years of experience and research. This special flywheel adds additional momentum and smoothness when compared to standard flywheels. Furthermore, it works perfectly in sync with the Synergy Pro's advanced belt drive magnetic resistance system, yielding a quiet and solid ride every time.

Synergy Pro Bike uses a belt drive magnetic resistance system, which makes the ride extremely quiet and allows people to ride while their partner or baby sleeps in the other room. It’s also perfect for watching TV or movies while getting a great workout. Combined with its magnetic resistance, it provides a virtually maintenance-free and silent ride. Simply twist the resistance knob to increase or decrease the resistance so keep your riding workout challenging and effective.



Monitor your workout efficiency when you track your average and max speed and cadence on the built-in performance monitor. Use the speed and cadence data to assess and analyze your general fitness progress or cycling performance.



Improve your fitness experience by securely placing your phone or tablet in the tablet holder. Utilize this added accessory and follow along to fitness videos, or listen to your workout playlist.


4-Way Adjustable Seat

The seat of the bike is built for comfort and is fully adjustable. You can adjust the seat up-down or front-back, depending on your height and comfort. It integrates a consistent layer of support and also has a longitudinal groove to promote a healthy blood flow.


2-Way Adjustable Handlebars

The handlebar is 2-way adjustable, and will adjust to any rider's body and workout.  It’s designed for multiple grips with a unified aero bar in the middle. It’s urethane-dipped, so it provides a secure and comfortable grip.


Heavy Duty Steel Frame

With an incredible 300 lb user weight capacity, feel confident on this indoor bike that will support your body. The heavy duty, steel frame is built for the toughest and the strongest fitness riders.


Emergency Stop Brake

Your workout can be brought to an immediate stop with the convenient emergency brake button. This bike has a bigger and wider fly wheel, plus the magnets are on the top-front of the flywheel, which make it easy to stop. 



Lock in and feel the momentum of your machine with foot cage pedals. Use the optional SPD pedals with compatible shoes to clip and attach your feet to the pedals or the built-in toe cages for ultimate stability. Avoid foot slippage at increased levels of speed and intensity.


Pulse Sensors

Monitor and maintain your target heart rate. Measuring your pulse rate is an important tool for exercising correctly and efficiently. The steadier and prolonged your elevated heart rate is during the workout, the more fat is burned. This important piece of health metric will help you better understand your health and fitness status.


Bottle Holder

The convenient bottle holder keeps your favorite refreshing beverage within arm's reach!  Proper hydration will ensure your health and workout performance stay at optimum levels!


Dumbbell Holder

Use this cycling exercise bike in tandem with dumbbells (not included) to engage muscles in your upper body and core while you cycle. You can store them onto the built-in dumbbell holders when they are not in use (up to 20lb).


Transportation wheels

Simply tilt and roll out for use or away for storage, no need for heavy lifting or muscle strain. The wheels at the front of the unit allow the user to move their equipment around with ease, from room to room, or store it away out of sight.


Floor Stabilizers

If there is any wobble or instability with this indoor exercise bike, you can simply adjust one of the floor levelers to ensure that it is completely level. 


“Unlike other stationary bikes, indoor cycle bikes include reinforced pedals which allows the user to stand up while biking.  Standing while cycling is a proven technique that encourages weight loss. In addition, they are also much more solidly constructed when compared to most stationary bikes and will not wobble even when pedaling vigorously.”



Performance monitor: speed, avg speed, max speed, cadence, avg cadence, max cadence, distance (miles or kilometers), target distance, calorie, race, time, target time, pulse

40 lb flywheel

Pulse sensors

Micro adjustable resistance

Multi-grip handlebar

Device holder

Floor stabilizers



Cushioned seat

Seat dimensions: 10.5L x 7W x 1.5H in

4-way adjustable seat

2-way adjustable handlebars

Bottle holder

Dumbbell holders

Caged/SPD compatible pedals

Transportation wheels


300 lb weight capacity

Magnetic tension system

Belt drive

Adjustable inseam: Min 29 in / Max 39.5 in

Handlebar to seat distance: Min 15.5 in / Max 19.5 in

Emergency brake system



Warranty: 3 year structural frame 180 days other parts and components

Product weight: 111.3 lb

Product dimensions: 49L x 22W x 46.5H

Ship weight: 125.9 lb

Ship dimensions: 41.5L x 10W x 34.6H


Warning iconCancer and Reproductive Harm -

  Warning iconCancer and Reproductive Harm -


The Product Manual may be downloaded below. If you have any questions, please feel free to contact our customer care team.

The innovative patented flywheel works in sync with its advanced magnetic resistance system and makes riding extra smooth, solid and quiet.

Yes! We have a great library of workouts that you can perform on your indoor cycle, which can be found on the Workouts section of our website as well as on our YouTube channel.

Yes! The Synergy Pro Magnetic Indoor Cycling Bike comes with dumbbell holders so that your dumbbells (not included) are readily available for upper body & core exercise in tandem with your cycling workout.

The performance monitor helps track speed, cadence (RPM), distance (mph/km), calories, time, pulse, race.

Feel confident sitting on our durable design with a 300LB max user weight limit.

The durable belt drive provides smoother and silent pedaling and requires less maintenance.

Like most exercise bikes, this Sunny Synergy Pro comes partially assembled. The flywheel, the belt, the crank set, and the brake are already in their place. All you have to do is attach the front and rear base bars, the seat post, the handlebar post, the saddle, the handlebar, and the pedals.

The task shouldn’t take more than 30 min. All the tools you will need for the assembly come with the box, while the included manual provides clear assembly instructions.

Yes! This bike has caged & SPD-compatible pedals with a clip so that you can use cycling shoes with cleats to connect directly into the pedals as you ride.

Magnetic resistance uses magnets to add resistance which allows for smooth and quiet riding experience. Since it’s a magnetic brake and its pad doesn’t touch the flywheel, you won’t have to worry about wear and tear, replacement, or any friction-generated noise.

There is a 3-year warranty on the structural frame and 180-day warranty on other parts and components.

Customer Reviews

Customer Reviews
4.7 Based on 340 Reviews
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Filter Reviews:
Scott D.
United States United States

Excellent Product

Easy to set-up and regular user with Peloton streaming for varied cycling workouts (Spin, Bike Boot Camp). Recommend the product. Actually have purchased a total of three (3) Synergy Pro Magnetic bikes for other family members as gifts to enjoy in various parts of the country. You will not be disappointed.

Linda D.
United States United States

New Synergy Pro Bike

The bike has been great. I've been riding for two weeks and already my stamina and leg strength has increased. I had an issue with the handlebar piece but Sunny Health sent me the small plastic piece I needed. I replaced it and got everything put together properly. Chelsea was great and checked in with me every day to make sure I got the help I needed! I love it AND would recommend to anyone.

Sunny Health and Fitness Synergy Pro Magnetic Indoor Cycling Bike Review
Candace M.
United States United States

Love this!!!

I went from being sedentary all day and night, working from home, struggling with the pandemic, not moving my body at all to now looking forward to coming home from work and hopping on the bike. This is an excellent bike, has all the tracking features to measure cadence, heart rate, distance, etc. It is well worth the price. You don't need to spend as much as you would with the popular competition.

Constance B.
United States United States

Extremely Happy!!!

This bike has met all my expectations! It is comfortable, well made, easy to assemble, quiet and performance has been great! For the purchase price, I am very satisfied and would recommend, if fact my daughter purchased one a few weeks after I did and now we are both getting great work outs!!!

Jennifer W.
United States United States

So happy with my purchase!

I absolutely love how quiet this bike is.... in a small house... this is a must! The weight of the bike frame and wheel give me a solid ride with no wobbling. The position of the handlebars and the resting area for your electronic device is so perfectly lined up so as not to obstruct your view. I admit, I did a lot of research before buying this bike to ensure the weight of the wheel, seat to handlebar length, quietness of a magnetic resistance, etc.. checked off all my expectations boxes and this one certainly did. Love it!

Sunny Health and Fitness Synergy Pro Magnetic Indoor Cycling Bike Review
Chantel V.
United States United States

Awesome bike!

I absolutely love this bike. The bike rides so quiet and smooth. It's very sturdy. Assembly was simple. My tablet stays on the stand even when I'm going hard. Love the dumbbell holder on the side. I added a gel seat cover but I imagine most bike seats are uncomfortable and could use extra padding. You get a lot with this bike for the price. I highly recommend!

Sunny Health and Fitness Synergy Pro Magnetic Indoor Cycling Bike Review