Synergy Magnetic Indoor Cycling Bike

Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike
Synergy Magnetic Indoor Cycling Bike

Synergy Magnetic Indoor Cycling Bike


100 reviews

Regular price

List Price:

Sale price $471.90 Save $140.95
189 in stock

Resistance icon

Device Holder

Monitor icon

Magnetic Resistance

Pulse sensor icon

Pulse Sensors

seat icon

Caged Pedals


Jumpstart your in-home fitness routine with the SF-B1879 Synergy Magnetic Indoor Cycling Bike by Sunny Health & Fitness. Indoor cycling can strengthen your cardiovascular health and engage your core, arms and lower body with proper and consistent exercise. Instantly boost your in-home cardio challenge with the magnetic resistance that makes your workout easy when you want it, hard when you need it.


Performance MONITOR

Build new workouts when you effectively track your progress by using the battery-powered display. Easily check your speed, distance, time, RPM, pulse, and calories-burned at a glance while you cycle.


Pulse Sensors

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


Device Holder

Improve your fitness experience by securely placing your phone or tablet in the tablet holder. Utilize this added accessory following along to fitness videos, or listening to your workout playlist. Whatever the use, you won’t be disappointed.


DumBBell HOlders

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


Magnetic Resistance

Revitalize your workout with integrated magnetic intensity which can amplify or reduce your cardiovascular challenge within seconds.


4-Way Adjustable Seat

Customize this bike around your individual height. Take advantage of the 4-way adjustable seat, 2-way adjustable handlebar and a wide leg inseam range of 27 inches to 37.5 inches.  


Caged Foot Pedals

Textured non-slip foot pedals will accommodate all sizes, while the remaining grip will ensure safe footing during the most demanding and vigorous workouts! Foot straps keep your feet saddled in so you can focus on the workout without feeling unbalanced.


Floor stabilizers

No matter the surface of your home, you will have a stable, stationary workout. Adjust the height of each foot leveler to create a balanced riding experience, even if you have uneven floors! Exercise more intensely without worrying about rocking or tilting!


Transportation Wheels

The front-mounted transportation wheels make moving the bike easy and convenient around your house for easy storage. Just tilt the bike forward and roll.



Performance monitor: speed, distance, time, calorie, odometer, rpm, pulse

30 lb flywheel

Micro-adjustable resistance system

Belt drive mechanism

Pulse sensors

Caged foot pedals

Floor stabilizers



Cushioned seat

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

4-way adjustable seat

2-way adjustable handlebar

Transportation wheels

Ergonomic grips

Bottle holder

Dumbbell holder


275 lb weight capacity

Magnetic resistance system

Adjustable inseam: Min 27 in / Max 37.5 in

Handlebar to seat distance: Min 16 in / Max 20.5 in

Emergency stop brake


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

(2) AAA batteries included

Product weight: 88.2 lb

Product dimensions: 49L X 22W X 50.5H

Ship weight: 102.5 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 differences for the Synergy & Synergy Pro bikes are the weight of the flywheel, the type of pedals it comes with, and the weight capacity. Both models come equipped with the specially patented flywheel, magnetic resistance, dumbbell holders, along with a water bottle holder.

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.

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

Feel confident sitting on our durable design with a 275LB max user weight limit.

The performance monitor helps track speed, distance, time, calories, odometer, rpm, pulse, with a scan mode.

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.

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
4.8 Based on 100 Reviews
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Filter Reviews:
Tiffany M.
United States United States
Great, affordable spin bike

It’s been 3 weeks of use. I do spin style workouts 2-3x/week for 45 min. It gets the job done! No glamour, just a simple spin bike. Definitely satisfied. Resistance is good for home use. Had to call customer service for a replacement bolt and very nice and easy to get in touch with.

Sunny Health and Fitness Synergy Magnetic Indoor Cycling Bike Review
A Sunny Health and Fitness Customer
Stan M.
United States United States
Fast delivery, EXCELLENT quality bike, money well spent

Fast delivery, bike came with everything required to assemble it, very easy to assemble, great build, runs smooth, I've been riding it for 30 minutes every other day with Peloton classes and I love the bike. Great value.

Kimberly H.
United States United States
Exceeded Expectations!

The bike arrived about two weeks ago in perfect condition, safely packaged with easy to follow instructions. I assembled it myself without any help in a little over an hour. I’ve used it just about every other day. It is so quiet and smooth and I am just really very happy with this purchase. Thank you!

Sunny Health and Fitness Synergy Magnetic Indoor Cycling Bike Review
Michelle R.
United States United States
5 stars!!!

I was hesitant to purchase the SF-B1879 because of the 30 lb flywheel. Most reviews were recommending 40 lbs or heavier. Initially we actually purchased the Synergy Pro that had the 40 lb flywheel but because my husband has short legs we were concerned that the minimum 29" inseam would be too long for him. Customer service was great and let me change my order just before it shipped. I can attest that this machine feels solid and has put my concerns to rest. I've used it a handful of times already and it's smooth and quiet. I purchased a more padded seat anticipating the stock seat would be uncomfortable as well as a little clip on fan. We did also get a speed and cadence sensor because my husband is wanting to pair it with the Zwift app. That's proving a little challenging but we'll work out the kinks. All in all- with my 10% discount we have less than $600 invested in this and I feel like we're getting the same quality workout as bikes at the gyms. Great value for the money and zero regrets. Thank you Sunny!!

Fabiola P.
United States United States
Just get it!

This has to be the best investment I've made for myself. Operation wise this bike is amazing, quiet, smooth, stable, basically everything you're looking for in a spin bike. I won't be going back to the gym and highly recommend you to check this bike out!

Mark K.
United States United States
1 Week Review - Impressed So Far!!

The build quality is very good, instructions were straight forward. Just broke 100 miles and it rides nice, still tweaking my setup, but impressed so far. Very quiet, I can ride in the morning with our waking the family. Really like having a conventional bike seat, opens up lots of options if you want something else.