Belt Drive Indoor Cycling Bike Exercise Bike w/ LCD Monitor

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

Belt Drive Indoor Cycling Bike Exercise Bike w/ LCD Monitor


6 reviews

Regular price

List Price:

Sale price $361.89 Save $98.10

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's 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 w/ 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" / Max 22"
  • Max User Leg Inseam: Min 26.5" / Max 37"


  • 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 easily 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: 82.9 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 34.3H 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
4.8 Based on 6 Reviews
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Filter Reviews:
Kyrsten J.
United States United States
Great bike for the price !

This bike is exceptionally sturdy for under $350. I have been a spin instructor at 2 major chains for 15 years and needed a bike to get me through this trying time with gyms closed. The bike arrived quickly and was assembled by my teenager! :) It is well designed for the rider; only issue is a pedal is 'clipping' (misaligned) after 3 uses but I've adjusted. Really I wish I had sprung for the model with clip in pedals, but I can wear my convertible shoes in the baskets. Very pleased with this purchase -- customer service gets 5 stars!

Karen W.
United States United States

So I love the price, the discount and how quickly they got it to me. The only thing I didn't like which is an easy fix...was the bike seat. I'm use to riding the spin bikes at gym, so I'm used to a narrow seat. This one is way to wide and caused a lot of pain. Hubby switched the seat to my actual bike seat thats more narrow and has a gel cushion on it. The only other complaint I have is that I can't seem to ride as fast as I can at gym so I don't burn as many calories. But I am really happy to finally have my spin bike so when I'm doing two a days, I can stay home for one.

Karen Wolfe verified customer review of Belt Drive Indoor Cycling Bike Exercise Bike w/ LCD Monitor
Catherine S.
United States United States
Excellent spin bike

I have gotten some great workouts on this bike!

Theresa J.
United States United States
Well made

Perfect addition to my exercise routine when it's cold, rainy, or dark outside. Love it!

Will recommend to others

I find the seat to be very comfortable in comparison to my 10 speed. So there's no need to replace the seat. Very pleased with the traction. Smooth ride. Very happy with purchase. Will recommend to others.