

Sunny Health & Fitness Stationary Bike, Synergy Pro Magnetic Indoor Cycling w Free SunnyFit® App - SF-B1851
Key item features
- Inertia-Ready Flywheel: The large 40-pound flywheel stores moving energy, ensuring consistent pedaling during workouts and can be stopped instantly with onboard magnetic brakes.
- Smooth Belt-Drive: Durable belt-drive mechanism provides a smooth and consistent ride, allowing you to focus on performance without distractions.
- Magnetic Resistance: Integrated magnetic resistance offers full control over workout intensity, delivering consistent performance for both easy and challenging workouts.
- Pulse-Sensing Grips: Built-in pulse-sensing grips monitor cardiovascular performance, displaying progress on the performance monitor.
- Dumbbell Holder: Includes built-in holders for dumbbells (up to 20 lbs), allowing upper body and core engagement during cycling.
- Adjustable Comfort: Features a 4-way adjustable seat and 2-way adjustable handlebars for customized comfort and stability, with toe cages and clip-in compatible pedals.
- Workout Analysis: Track average and max speed, and cadence on the performance monitor to assess fitness progress and cycling performance.
- Free SunnyFit App: Access 1,000+ trainer-led workouts, 10,000+ virtual scenic tours, and track progress with the free SunnyFit App, no membership fees required.
Specs
- Exercise bike typeSpinner Bikes
- Max load300 lb
- Power typeBattery
- Number of resistance levels0
- Resistance methodMagnetic
- Height46.5 in
Reviews summary
Pros
- : Assembly process is straightforward.
- : Provides quiet and jerk-free pedaling experience.
- : Provides a challenging exercise experience.
- : Offers great value at this cost.
- : Bike's build is durable and made with high-quality materials.
Neutral
- : Can be quiet, but also produces thumping or grinding sounds in some cases.
- Free shipping
Free 30-day returns
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About this item
Product details
- INERTIA-READY FLYWHEEL: The large 40-pound flywheel is designed to store moving energy that keeps you pedaling consistently during your cycling workout. The onboard magnetic brakes can bring the wheel to a stop instantly.
- BELT-DRIVE MECHANISM: This bike has a durable belt-drive mechanism that is smooth and consistent, allowing you to focus more on your performance while you’re on the bike.
- MAGNETIC RESISTANCE: The integrated magnetic resistance puts you in full control of your workout intensity. It delivers consistent performance that makes your workout easy when you want it, hard when you need it.
- PULSE-SENSING GRIPS: Monitor your cardiovascular performance with the built-in pulse-sensing grips so you can actively check your workout progress, displayed on the performance monitor.
- 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 place them onto the built-in dumbbell holders when they are not in use (up to 20 lbs).
- BUILT FOR COMFORT: Customize the bike to your height with the 4-way adjustable seat and 2-way adjustable handlebars. Maximize your cycling stability when you place your feet in the toe cages or on the clip-in compatible pedals.
- WORKOUT ANALYSIS: Monitor your workout efficiency when you track your average, 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.
- Enjoy FREE access to the SunnyFit App with every Sunny Health & Fitness product—no membership fees! Dive into 1,000+ trainer-led workouts, explore 10,000+ virtual scenic tours, track your progress, challenge others, and much more!
- 40-LB FLYWHEEL The swift 40-pound flywheel will make it easy to get your exercise cycling routine started, while also maintaining speed and consistency as you pedal. The cast-iron make prevents any issues with pulleys or loud sounds.
- SILENT AND SWIFT RIDE Built with a modern near-silent belt-drive mechanism to give a smooth and consistent performance, removing any distractions as you work out no matter the time of day even when people are sleeping.
- MAKE YOUR SUNNY BIKE SMART With an easy addition of our CB110 Cadence Sensor (sold separately), get everything you need to track cycling metrics. Pair with the Free Sunnyfit App to enhance your cycling with 1000+ workout videos synced to your bike.
- MAGNETIC RESISTANCE The integrated magnetic resistance puts you in full control of your workout intensity. It delivers consistent performance that makes your workout easy when you want it, hard when you need it.
- PERFOMANCE MONITOR AND TABLET MOUNT The LCD lets you check your speed, distance, RPM, pulse, and calories-burned at just a glance as you ride on your exercise cycle. Use our SunnyFit App with the tablet mount to ride with our free workout videos.
- PULSE-SENSING HANDLES Monitor your cardiovascular performance with the built-in pulse-sensing grips so you can actively check your workout progress, displayed on the stationary bike performance monitor.
- DESIGNED FOR YOU Soft, comfortable 2-way adjustable handlebars and 4-way adjustable seat lets you adjust your indoor bicycle to match your frame. The caged foot pedals can also be adjusted to fit your shoes, ensuring a comfortable ride.
- EASY TO USE Intuitive dial to turn for resistance, emergency brake by pressing the dial, bottle holder, and dumbbell holder let you ride with ease. Built with transport wheels to make moving around a breeze, no matter the space.
- HEAVY DUTY & SAFE BUILD Designed with strong and sturdy materials for optimal stability while cycling and supports users up to 300 LBs, made to provide you with a safe experience. Adjustable features, 40 LB flywheel, and more to keep users safe.
- PREMIER U.S.-BASED BRAND With 20+ years of excellence, Sunny Health & Fitness delivers top-notch equipment dedicated to excellence. With our devoted support team and certified trainers enjoy an unmatched FIT FOR EVERYONE experience.
Specifications
Exercise bike type
Max load
Power type
Number of resistance levels
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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Customer ratings & reviews
Reviews summary
Pros
- : Assembly process is straightforward.
- : Provides quiet and jerk-free pedaling experience.
- : Provides a challenging exercise experience.
- : Offers great value at this cost.
- : Bike's build is durable and made with high-quality materials.
Neutral
- : Can be quiet, but also produces thumping or grinding sounds in some cases.
Showing 1-3 of 506 reviews
Synergy Pro Has What I'm Looking For
With its belt drive and magnetic tension my new indoor bike seems more finely __quote__tuned__quote__ than my old, and certainly smoother and quieter, yet has the same stability and durability. I've made a good step up. I haven't learned the electronics yet but expect they will also result in better workouts.
Awesome Bike!!!
I can't say enough good things about this bike. The shipping was quick, the assembly was easy, it's whisper quite and seems so well built. What a great value for the price!!! I'm so glad I did not pay 3x the money (or more) for a comparable bike. So much fun to ride and easy to move around from room to room, or indoors to outdoors. Love everything about it. The seat is padded and fine for most people, but I will replace it for a larger more cushiony seat only because I have no junk-in-the-trunk, other than that, I'm loving it!
Very Satisfied - Pro Magnetic Cycling Bike
I've had my Pro Magnetic Cycling Bike for about a month and I am extremely satisfied with it. I did a lot of research and shopping around before this purchase and I really feel like this bike is the best buy. While it's not __quote__connected__quote__ like a Peloton or Echelon bike (where the cost is much, much more in addition to a subscription), Sunny Fitness provides no-cost training videos that you can ride to. The price for the Pro Magnetic is very reasonable. My schedule forces me to workout early before any gyms open and this provides a great ride. It's smooth and extremely quiet and definitely a step above the trainer I'd been using for years. The ordering process was great and I received it a few days sooner than scheduled. It is heavy and cumbersome to handle and I had to open the package and carry it to the basement piece by piece. Assembly was pretty straightforward and took about an hour. There was one, slightly defective part (a plastic snap was broken), but Sunny has been right on it to get a replacement part. I would definitely recommend this bike to others.
