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Sunny SF-B1423 Belt Drive Indoor Cycle Review

Last Updated on June 27, 2021 by Jeff

Sunny Health and Fitness SF-B1423 Belt Drive Indoor Cycle

Sunny Health and Fitness SF-B1423 Belt Drive Indoor CycleThe Sunny Health and Fitness Belt Drive Indoor Cycle is similar to others from this company in this price range, however it has the belt drive for quieter workouts, whereas the comparable models have chain drive. The Sf-B1423 has a chromed, 40-pound flywheel and a steel frame making it a durable, stable exercise bike even at high speeds and intense workouts. Resistance is adjustable and the step-down braking system is a great safety feature.

The seat and handle bars are both adjustable so that you can find the perfect position. In biking, the correct positioning of your hands and arms as well as feet and legs is key to proper form. Bad form can result in injuries that will prevent you from getting back on your bike for a while. Everything from resistance to seat adjustment can be managed with a simple turn of a knob.

Technical Info


  • Height: 47”
  • Width: 20”
  • Length: 44”
  • Item Weight: 94 lbs
  • Max user weight: 265 lbs

Seat Dimensions:Sunny Health Fitness SF-B1423 Belt Drive Indoor Bike

  • Height: 2.5”
  • Width: 9.5”
  • Length: 10.5”

Seat to pedal length:

  • Minimum: 28”
  • Maximum: 36”

Handlebar Height:

  • Minimum: 38”
  • Maximum: 42”


  • 40 lbs chromed flywheel with belt drive makes this a challenging bike with a variable workout and quiet ride.
  • LCD monitor lets you track your progress as you go so that goals are always right in front of you.
  • Fully adjustable, high density padded seat can move up or down, forward or backward so that you are in the proper position and comfortable for even long rides.
  • Adjustable handlebars let you find the right-hand grip for your needs.
  • Press down brake lets you stop quickly just like on a road bike.
  • Transportation wheels helps wheel your bike to and from wherever you need it to be.
  • Resistance is changed with a manual knob.
  • Steel frame for durability.
  • Water bottle holder keeps water right at your fingertips.

MonitorSunny Health Fitness SF-B1423 Belt Drive Indoor Bicycle

LCD Readout

  • Tracks: time, speed, distance, calories burned
  • Scan function lets you see a scrolling array of all of your numbers.


  • Frame: 3 years
  • Parts and Components: 90 days

Shipping and Assembly

Looking for deals such as free shipping should be a given. While not extremely heavy, at 94 pounds it may be too hard and too bulky to get into a personal vehicle. Free shipping seems to be the norm with items from Sunny Health and Fitness, so you should have no problem finding the best and easiest deal.

Assembly is very easy with most of the major components already together upon arrival. A few items, such as the pedal and crankshaft assembly, will need to be attached and all bolts should be checked and tightened before that first ride.

What We Love About the Sunny Health and Fitness SF-B1423 Belt Drive Exercise BikeSunny Health Fitness SF-B1423 Belt Drive Indoor Cycling Bike

Workout Versatility

The chromed, 40-lbs flywheel gives trainees the option to add or reduce the resistance at will. You can structure the workout any way you like, whether you are more of a slow and steady rider, or someone who prefers to do HIIT workouts instead. High intensity interval training lets you burn more calories in a shorter period of times and can help keep you engaged since the resistance level and the speed is constantly being changed.

Adjustable for a Wide Range of Trainees

Unless you have bought an exercise bike for just yourself with no plans to share it, you need one that can accommodate a wide range of heights and arm lengths. The SF-B1423 allows you to adjust the seat both higher and lower, as well as nearer or farther from the handlebars. The handlebars themselves are also adjustable for height. Proper placement of your limbs is important for proper riding form. Poor form will not only dampen your enjoyment of your ride, but it can promote injury as well.

Safety Features

Safe riding should always be a top priority even with an indoor exercise bike. From the foot cage pedals and adjustable foot strap to the press down braking system, the SF-B1423 is a safe bike for nearly all trainees at every level of fitness and health.

What Isn’t So Great

Pedal and Crankshaft Assembly

Whether it is a design flaw or a problem with installation and assembly remains to be determined, but there are seems to be a lot of issues with this particular part of these bikes, across all of the models, including the chain drive and others. Without pedals and a working crankshaft, the bike is no good, so this must be addressed by Sunny Health and Fitness and soon.

Customer Care Doesn’t Seem to CareSunny Health Fitness SF-B1423 Belt Drive Indoor Cycle

It’s a solidly built bike with a decent warranty so problems should be rare. The problem is that when there is a problem, no one at the company really seems to care. Emails that go unanswered for more than a day or so and phone calls that are never returned are just unacceptable.

How the Sunny Health and Fitness SF-B1423 Compares to the SF-B1423C

Both models have 40-pound flyweights and adjustable resistance. Both have the press down braking system, adjustable seats and handlebars and the foot cage pedals. They are similar in price with the SF-B1423C model coming in about $10 cheaper. Both have the same dimensions and the same maximum user weight.

Where they differ is with the drive system. The SF-B1423 is a belt drive while the SF-B1423C is chain drive. The belt drive tends to be quieter and smoother during operation.

Final Word on the Sunny Health and Fitness SF-B1423 Indoor Bike

With a steel frame and plenty of safety features, this is a sturdy, durable exercise bike that will not only give you a solid workout but can be used for trainees of various heights and fitness levels. All adjustments from resistance level to the height of the seat can be changed by turning the appropriate knob. Still in the moderate price range, it is well worth the money.