Belt Drive Indoor Cycling w/ LCD Monitor

Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor
Belt Drive Indoor Cycling w/ LCD Monitor

Belt Drive Indoor Cycling w/ LCD Monitor


14 reviews

Regular price $459.99 Save $-459.99

resistance icon

Digital Monitor

sturdy frame icon

Micro-Adjustable Resistance

flywheel icon

30 lb Flywheel

seat icon

4-Way Adjustable Seat


The new standard in home fitness. Sunny Health & Fitness SF-B1421 Indoor Cycling Bike offers all of the necessities for an amazing cycling workout along with any and everything all at-home fitness enthusiasts could wish for. Exercising in the comfort of your own home has never been so easy, convenient, or fun. Its fully adjustable handlebars and high density padded seat offer a completely customizable experience for ultimate user experience and compatibility


Digital Monitor

Tracking your progress on the SF-B1421B is simple with the Digital Monitor screen! Exercising with your SF-B1421B screen display will showcase the distance and time to keep you focused to achieving any type of personal fitness goals. The convenient scan mode displays your progress to assist you in tracking all your fitness goals.



The heavier the flywheel, the smoother the ride! Creating more momentum for longer periods of time keeps your workout going the distance. Sunny Health and Fitness' flywheel is second to none when it comes to feeling like you are really riding outdoors! No more jerky, out of control movements, regardless of speed or resistance level!


Micro-Adjustable Resistance

The resistance system allows for various tension levels allowing you an intense workout thus burning more calories.


Non-Slip Handlebars

Help prevent calluses with Sunny Health & Fitness handlebars. Non-Slip handlebars offer comfort while enduring long rides. These easily adjustable and completely customizable handlebars provide comfort while enduring intense rides. 


4-Way Adjustable Seat

With a simple twist of a knob, you can move back and forth (and up / down) so your workout can remain comfortable.


Transportation Wheels

Making the transformation of your home into your own personal fitness studio is effortless with these convenient transport 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 bike around with ease, from room to room, or store it away out of sight.



The seat can be adjusted for height and proximity to handlebars for setting up your cycle bike, sizing and fitting.

  • Adjustable Seat to Handlebar Distance: Min 17.5 in / Max 22 in
  • Max User Leg Inseam: Min 26.5 in / Max 37 in


  • 45.75L x 20.5W x 49.75H inches
  • Max Weight Capacity: 265 lbs



Monitor: time, speed, distance, calorie, scan

30 lb chromed solid flywheel for stability

Micro-adjustable resistance system

Caged foot pedals

Smooth and reliable belt drive system


Cushioned seat

Seat dimensions: 10.5L x 10W x 2.5H in

Easy 4-way adjustable seat

2-way adjustable handlebars

Integrated transportation wheels for easy mobility

Bottle Holder


265 lb weight capacity

Felt pad resistance system

Heavy duty crank system

Adjustable inseam height: Min 26.5"/ Max 37"

Seat to handlebar distance: Min 17.5 in/ Max 22 in


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

Product weight: 93.4 lb

Product dimensions: 45.75L x 20.5W x 49.75H in

Ship weight: 93.4 lb

Ship dimensions: 41.7L x 8.7W x 34.7H in

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 digital monitor helps track time, speed, distance, calorie, with a scan mode.

This bike comes with a micro-adjustable resistance knob so that even the slightest increase or decrease in resistance are smooth and customizable.

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 handlebars are 2-way adjustable (up and down) and the seat is 4-way adjustable (up, down, forward, backwards) for a fully customizable fit.

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

The resistance you’ll feel with contact resistance is incredibly strong. A felt pad is used to apply pressure to the flywheel through varying degrees of contact. The resistance can be adjusted by twisting a micro-tension knob.

Feel confident sitting on our durable design with a 265LB max user weight limit.

The best way to see if this bike would be suitable for you is to measure your inseam. This bike can accommodate inseams between 26.5" and 37".

The main difference is that The SF-B1421 has a chain drive system and the SF-B1421B has a belt drive system. A belt drive system has a belt that connects the pedals to the wheels for a smooth ride. A chain drive system uses a chain to connect the wheels to the pedals.

User manuals have recommended maintenance for your equipment. Manuals can be downloaded from our website on each product page, please search for your product to visit the product page.

Contact our customer service team here for parts and technical assistance.

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

Customer Reviews

Customer Reviews
4.6 Based on 14 Reviews
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Maddie M.
United States United States
Very Noisy Sound

I was very excited about this purchase, but after a short time of using it, the resistance break started making a horrible humming noise. As you increase resistance, the break presses against the wheel and creates a very loud humming noise that makes it very hard to enjoy your work out. I unfortunately cannot increase resistance because the noise it makes is so irritating! I would not recommend this bike to anyone. I've only used it for 2 months and I'm already regretting this purchase.

Sunny Health and Fitness

Hi Maddie! Thank you for bringing this to our attention so we can better service you. We sincerely apologize that you experienced this setback with our product and want to get your product up and running the way it's suppose to. We see your ticket was submitted on Saturday11/28 however our office was closed to celebrate Thanksgiving. Please note our normal business hours are from Mondays - Fridays from 8:30 A.M. to 5:30 P.M. PST. Response time may be higher than usual as we are catching up over the long weekend. Please be patient with us and we'll get to you as soon as we can!

Raymond R.
United States United States
Perfect for our needs

It's a great bike! Keep in mind it's simple so if you're looking for bells and whistles, I'd recommend checking out their other bikes. This is perfect for what my son and I needed it for which was to just hop on and get some exercise in.

Cecilia P.
United States United States
Good quality bike

Bike rides well. I was worried it wouldn't be enough of a challenge for me but there's a good range of resistance that's suitable for any skill level.

Bennett N.
United States United States
Sunny bike

Resistance is good and feels smooth when changing tension and I like that the bike comes with a bottle holder.

George T.
United States United States

Assembled this unit in 30 minutes. Loving the bike after my first few rides. I was looking for something that was affordable but can still provide a good cardio workout. This bike fit the bill. So far I'm satisfied with my purchase.

Alex H.
United States United States
You don't have to go broke

I've had this bike for 4 months now and it's still holding up well. It's quiet, smooth, and consistent. It's worth the money for anyone that wants to get into spinning without breaking the bank.