---
product_id: 253369505
title: "Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851"
brand: "sunny health & fitness"
price: "7222 kr"
currency: DKK
in_stock: null
reviews_count: 5
url: https://www.desertcart.dk/products/253369505-sunny-health-and-fitness-synergy-pro-magnetic-indoor-cycling-bike
store_origin: DK
region: Denmark
---

# 40 lb flywheel for smooth momentum Built-in pulse sensors for real-time heart rate Magnetic resistance for precise intensity control Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851

**Brand:** sunny health & fitness
**Price:** 7222 kr
**Availability:** ❌ Out of Stock

## Summary

> 🚴‍♂️ Ride the future of fitness—where power meets precision!

## Quick Answers

- **What is this?** Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 by sunny health & fitness
- **How much does it cost?** 7222 kr with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.dk](https://www.desertcart.dk/products/253369505-sunny-health-and-fitness-synergy-pro-magnetic-indoor-cycling-bike)

## Best For

- sunny health & fitness enthusiasts

## Why This Product

- Trusted sunny health & fitness brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Heart Rate Hero:** Integrated pulse-sensing grips keep your cardio goals front and center with live feedback.
- • **Momentum Mastery:** 40-pound flywheel ensures ultra-smooth, consistent pedaling—ride like a pro every session.
- • **Resistance Royalty:** Magnetic resistance lets you dial in your workout intensity with whisper-quiet precision.
- • **Dual-Action Training:** Combine cycling with dumbbells to sculpt upper body and core while you burn calories.
- • **Ergonomic Excellence:** Adjustable seat and alloy steel frame deliver comfort and durability for every rider size.

## Overview

The Sunny Health & Fitness Synergy Pro SF-B1851 indoor cycling bike features a heavy 40-pound flywheel for smooth momentum, magnetic resistance for customizable workouts, and built-in pulse sensors to monitor heart rate. Designed with an adjustable seat and durable alloy steel frame, it supports riders up to 136 kg and integrates upper body training options, making it a versatile, quiet, and professional-grade cardio machine.

## Description

Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 : desertcart.ae: Sporting Goods

Review: Justo lo que necesitaba - Es bastante comoda y muy maciza, requiere algo de ensamble pero vale la pena. Es muy silenciosa y facil de mover gracias a las ruedas que trae al frente. Es exactamente lo que necesitaba!
Review: All good so far - This spin bike arrived on Sunday and my husband and I have used it every day since (5 days so far). It was very easy to assemble (although the box is super heavy) and the quality seems excellent so far - smooth and quiet. I am 5'2" (160cm) and my husband is 5'10" and fits us both fine.

## Features

- The large 40-pound flywheel is designed to store moving energy that keeps you pedaling consistently during your cycling workout.
- Monitor your cardiovascular performance with the built-in pulse-sensing grips so you can actively check your workout progress, displayed on the performance monitor.
- The integrated magnetic resistance puts you in full control of your workout intensity.
- Use this cycling exercise bike in tandem with dumbbells (not included) to engage muscles in your upper body and core while you cycle.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07Z45R1RT |
| Brand | Sunny Health & Fitness |
| Brand Name | Sunny Health & Fitness |
| Color | black |
| Colour | black |
| Country of Origin | China |
| Customer Reviews | 4.4 out of 5 stars 350 Reviews |
| Drive System | Belt |
| Global Trade Identification Number | 00815749012432 |
| Handle Material | Alloy Steel |
| Item Dimensions D x W x H | 55.9D x 124.5W x 118.1H centimeters |
| Item Type Name | Synergy Pro Magnetic Indoor Cycling Bike |
| Item Weight | 50 Kilograms |
| Item height | 46.5 inches |
| Item weight | 50 Kilograms |
| Manufacturer | Sunny Health & Fitness |
| Material | Alloy Steel |
| Maximum Height | 84 Inches |
| Maximum Weight Recommendation | 136.08 kg |
| Minimum Height | 152.4 Centimeters |
| Model Name | SF-B1851 |
| Model Number | SF-B1851 |
| Power Source | Battery Powered |
| Power source | Battery Powered |
| Recommended Uses For Product | Indoor |
| Recommended uses for product | Indoor |
| Resistance Mechanism | Magnetic |
| Special Features | Adjustable Seat |
| Special features | Adjustable Seat |
| UPC | 815749012432 |
| Unit Count | 1.00 Pack |

## Product Details

- **Brand:** Sunny Health & Fitness
- **Colour:** black
- **Power source:** Battery Powered
- **Recommended uses for product:** Indoor
- **Special features:** Adjustable Seat

## Images

![Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 - Image 1](https://m.media-amazon.com/images/I/71mg-WQDRaL.jpg)
![Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 - Image 2](https://m.media-amazon.com/images/I/81M2QGPDDTL.jpg)
![Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 - Image 3](https://m.media-amazon.com/images/I/81ds2JQM0YL.jpg)
![Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 - Image 4](https://m.media-amazon.com/images/I/81l-Uo7MxVL.jpg)
![Sunny Health & Fitness Synergy Pro Magnetic Indoor Cycling Bike - SF-B1851 - Image 5](https://m.media-amazon.com/images/I/81tA9vbCbfL.jpg)

## Questions & Answers

**Q: Is the monitor battery only, or can it be plugged in to wall?**
A: The monitor uses a battery only.

**Q: I tried to change the seat, but the bolt(s) on the existing seat wouldn't budge with a wrench. Any tips, suggestions, warnings re changing the seat?**
A: Use 2 wrenches on both nuts. One to hold & one to unscrew.

**Q: My magnet will no longer stay in place. how do i go about fixing this? it stays close to the wheel no matter how light i go with resistance.**
A: I don’t know. I have no problems with this bike other than the seat being small and hard.

**Q: What is the lowest total height of the handlebars and device mount? I would like to place this underneath my standing desk.**
A: 41" inches. With the handlebars locked in in the lowest position, the measurement from the floor to the top edge of the device mount is 41". the handlebars are slightly lower than the top edge of the device mount.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Justo lo que necesitaba
*by E***S on 22 December 2023*

Es bastante comoda y muy maciza, requiere algo de ensamble pero vale la pena. Es muy silenciosa y facil de mover gracias a las ruedas que trae al frente. Es exactamente lo que necesitaba!

### ⭐⭐⭐⭐⭐ All good so far
*by F***S on 11 February 2022*

This spin bike arrived on Sunday and my husband and I have used it every day since (5 days so far). It was very easy to assemble (although the box is super heavy) and the quality seems excellent so far - smooth and quiet. I am 5'2" (160cm) and my husband is 5'10" and fits us both fine.

### ⭐⭐⭐⭐ Solid, Silent, Smooth, Needs a Little Work
*by G***D on 11 January 2026*

This bike is gym-quality. Solid, silent, smooth. Easy to assemble. I’d give it five stars except the dumbbell holder, which was a major selling point, feels like an afterthought. The weights keep falling off. A little more engineering could have solved this. And the seat is uncomfortable. I shouldn’t have to buy an additional seat pad.

## Frequently Bought Together

- Sunny Health & Fitness Synergy Series Magnetic Indoor Cycling Exercise Bike
- Sunny Health & Fitness Non-Slip Home Gym Mat – Workout Floor Protection Foam Pad for Treadmill, Bike, Elliptical, Yoga and Exercise Equipment – Available in Multiple Size Options
- Temple Tape Ultra Gel Bike Seat Cushion - Extra Soft Bicycle Saddle Cover for Spin, Exercise Stationary Bikes and Outdoor Biking - Premium Accessories for Comfort While Cycling

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**Shop now:** [https://www.desertcart.dk/products/253369505-sunny-health-and-fitness-synergy-pro-magnetic-indoor-cycling-bike](https://www.desertcart.dk/products/253369505-sunny-health-and-fitness-synergy-pro-magnetic-indoor-cycling-bike)

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*Product available on Desertcart Denmark*
*Store origin: DK*
*Last updated: 2026-01-24*