Keiser M3i Indoor Cycling Bike Review – [January 2021]

In A Hurry? Our Top Reasons To Buy

Built For Users Who Want: Durable, Sturdy bike that can be adjusted to different user height.

Keiser M3i

Keiser M3i Indoor Cycle​

  • Industry’s First V-Shape Frame.
  • Bluetooth-enabled Interactive Cycling.
  • Greater Comfort, Easier To Use
  • Polar Heart Rate Monitor
  • Built-in water bottle holder.
  • 300 lbs Weight Limit
  • Less Maintenance, Longer Bike Life.
  • Designed To Fit Any Rider.

If you are looking for the quietest and the most feature packaged indoor cycle, look no further. The Keiser M3i is for you. This exercise cycle was the first to feature a Bluetooth wireless computer to allow the riders to connect to the online platforms.

It is worth considering for commercial use or gym use. You can also download workout statistics via an app from the computer to either their smartphone or tablet. Moreover, it is very innovative, especially in the testing of the accuracy of its power. It is the first exercise bike to clear the EN ISO 20957-1 certification.

This certification assures that you’ll get the right feedback related to the workout in + 10%. It is suitable for Gym owners, Elite cyclists, and Indoor cycling instructors. It is one of the best commercial-quality spin bikes.

Although it comes with a hefty price tag, you can take advantage of Amazon’s great Keiser M3i Indoor Cycle Bundle deal and get the Indoor cycle together with many accessories.

Keiser M3i Indoor Cycling Bike Review: First Impressions​

Keiser Cycle

Technical Specifications
Weight Capacity300 lbs
Q-Factor197 mm
Drive systemBelt
ResistanceMagnetic, 24-levels
FootprintH 45″ x W 26″ x L 49″
Foot Levelers4 Points
BluetoothStandard 4.0
Heart RatePolar chest strap
FlyWheel8 lbs
User HeightMin 4.10″/Max 6.7″

The Good

  • It gives 24 levels of resistance that is a wide range for a spin bike.
  • Comfortable and adjustable seat
  • It uses eddy current magnetic resistance for smooth & quiet operations.
  • The indoor cycle has an LCD that shows essential workout data.
  • Powered by batteries and doesn’t require an electric supply
  • It features Shimano Combo Pedals (SPD).
  • It has a media tray and a water bottle holder.
  • A compact bike that requires less space
  • Its handlebars can be adjusted in 4 ways.

The Bad

  • It doesn’t have any preset workout programs.
  • It is expensive.

Keiser M3i Indoor Bike: Detailed Features​

  • Caged Pedals: It has re-designed pedals that are very comfortable. You can workout using normal athletic shoes or cycling shoes as the pedal comes with both the SPD as well as the cage.
  • Flywheel: It comes with a Flywheel of 8 pounds and is made of steel. Keiser ensures that the rider gets the most natural ride.
  • Adjustable Saddle: Its seat can be replaced easily and comfortable compared to other indoor bikes. It can be adjusted as per the height of the user. Just adjust the levelers which are behind the seat. The rider can adjust in for different ways – forward/aft, up and down.
  • Resistance: The bike comes with 24 magnetic level resistance, which is perfect for any range of cycling – intense, medium, or easy training. It ensures no parts touch the flywheel, and the transition between gears is quiet.
  • Handlebars: It has ergonomic shape handlebars that don’t place a lot of strain on the back. Moreover, it gives a good view of the tablet/phone screen when kept on the tray. You can adjust it in four different ways to suit your distinct heights.
  • Bluetooth: It is the first spin bike that features Bluetooth technology. You can create your profile on compatible applications and save all your workout statistics on it.

In-Depth Review​

V-Shape Frame

This exercise cycle has a sleek and modern design. Its V-Shape design and the rear flywheel is the most eye-catching. The perfectly designed footprints of the bike help to keep the bike and rider steady even during the intense exercise.

The material used in the frame is heavy-duty steel and aluminum. It has dark black and shiny red color and strength design that can attract even those who don’t do the spinning workout. Moreover, its V-pattern frame helps to get on and off the cycle easily.

You can adjust the frame in a few seconds, lose the knobs and raise or lower both the handlebars and seat. It is a real deal-breaker with its 4-way adjustable handlebars, especially for cyclists taller or shorter than average.

It sports a rust-resistant design due to stainless steel hardware and rear-mounted flywheel, which keeps its important parts out of the sweat zone.


It boasts the latest revolutionary re-designed pedals for a better and more comfortable experience. Keiser introduces curved crank arms for a better fit and extra-durable Shimano pedals. They offer ample space for any type of rider footwear, including wide gym shoes, and maintains proper distance for wider hips.

  • The curvature of the pedals matches shoe design and eliminates pressure points on the user’s foot.
  • It supports easily accessible SPD tension adjustment.
  • Features flexible and strong axle design, which evenly distributes stress load.
  • Its Re-angled SPD clip position provides good clearance between the cage and the ground when using the SPD clips.
  • It has stronger bearings tested for dynamic and static loads experienced when the user gets on, off, and rides the bike.
  • Ramped barbs enable for secure foot placement without insertion difficulty.


The heavier flywheels are smoother because the extra weight builds momentum and reduces the chances of your pedal strokes.

It uses a belt drive – this means that a belt is used rather than a chain to connect the pedals to the flywheel. Belts are favored to chains since they are quieter and need less maintenance. Belts are generally found on higher-end indoor bikes as they cost a little more.


  • Water Bottle Holder: It fits both big and smaller bottles to keep you hydrated.
  • One set of AA batteries for LCD
  • Wireless Polar Strap
  • Assembly and maintenance tools
  • M3i indoor cycle holiday bundle includes a media shelf
  • Floor protection indoor cycling mat


Keiser Console

The big advantage of this indoor cycle is the ability to monitor and upload your performance. Simple computer display – thus, zero need for you to fiddle with them. It displays everything riders need to know when working out.

The display comes with a light sensor at the top of the console. It turns ‘ON’ only when low-ambiance-light is detected. If the room light is enough to read the numbers without the backlit, then it stays off. It is a great feature for long battery life.

It Displays accurate and immediate numbers, as proven by its TUV certification of power accuracy and safety EN957-1. Furthermore, it is simple to read and deliver all the required data as follows:

  • RPM (Revolutions Per Minute): It amounts to how many times you pedal a full circle within a minute. It represents the speed at which the user is cycling and also known as cadence.
  • Heart Rate: When the heart rate monitor is detected, the heart symbol will begin to blink, and a heart rate value will be displayed. The heart rate strap should be Gym Link Compatible and preferably H1 or H7.
  • Watts and KCAL: It tells rider how much power they are generating. The display alternates between watts and calories burned every few seconds.
  • Elapsed Time: It displays the total time spent cycling and rests to zero if there are more than 60 seconds of inactivity.
  • Odometer: This is for maintenance purposes. When you start pedaling, it shows the trip distance the bike has ever been ridden. After 8 secs have passed, the computer will indicate on its place the distance the user has ridden during the workout.
  • Current Gear: The gear bike is set on and shown at all times, ranging from 1 to 24. It makes it easier to adjust resistance after an interval.
  • Calculations: Average power, cadence, and RPM are shown on the computer after every interval is finished.
  • 60 Seconds: When you stop pedaling for 60sec, the workout data automatically resets to zero.

There are four latest features on this M3i console-

  • Bike ID# set up
  • Interval exercise set up
  • Bluetooth for data storage
  • Mile and kilometer set up

Interval Training

To begin an interval, starting from high gear, drop the shifter handle to gear 1 for one-fourth of second and lift it to high speed immediately. “inL #” will display that confirms the interval has started.

To end the interval, repeat the above steps. When the interval ends, it displays “inL End”.

Compatible Apps

According to the Keiser website, some of the apps that supports the M3i bike:

  • Keiser M3 Series Pro apps (iOS and Android)
  • Empowered BeTested (Android)
  • Ride Buddy Buckets (iOS)
  • GOInd (iOS)
  • Empowered BeTrained (Android)


Bike Functionality


Both saddles and handlebars are adjustable to deliver comfortable positioning. It gives you the freedom to adjust the height and fore/aft positions. The handlebars are also multi-grip that makes it easier for you to find a comfortable position.

It stimulates the on-road riding experience that will also be smooth and quiet.


Keiser M3i indoor cycle is one of the technologically advanced spin cycles. Its comfort ratio makes M3i a worthy choice for those who want to maintain their activity level and keeping up the day’s work.

The handlebars are covered with better grips to prevent blisters. They are not padded thickly, so don’t depend on them for long hours. Furthermore, you can easily keep track of your workout with the monitor that displays steps, speed, weight, and other details.


It has 24 levels of magnetic resistance system for all cycling ranges, while most indoor cycle has less than 20 levels. The M series spin bikes feature Eddy Current Magnetic, which means nothing comes in contact with the flywheel.

It is quiet and smooth since no parts touch each other. The more tension you give the cycle, the more surface of the flywheel gets covered by the magnets. The gear level is displayed at the bottom left corner of the LCD that is a unique and useful feature.


This Keiser M3i indoor cycle arrives partially assembled. The main portion you have to assemble is the flywheel, crank arms, frame, console, and the pedals. The entire process requires around 2 hours.

Make sure to follow the manual step by step and put it together. If you fail to follow the instructions, the warranty doesn’t cover the future damages.

What’s covered by the warranty?

  • 3 year all-inclusive (except labor and wearable parts)
  • 90 Days wearable parts (cage, pedal strap, seat upholstery)

Final Verdict​

After taking a close look at Keiser M3i spin bike, it’s clear that why this bike seems at the top of everyone’s “best of” list. The design and appeal of the M3i are worth $2000. It weighs 85 lb and has two silicon wheels that make it easy to move around in the gym or house.

Overall, if it is in your budget, this exercise bike is a high-end machine that can take your fitness to the next level. Its dimensions are compact and allow the user to store it without the need for a lot of space.

Frequently Asked Questions​

1. What is the difference between Keiser M3 and M3i?

M3 is the standard model of magnetic resistance indoor bike. It features a 4-way seat adjustment and a vertical handlebar adjustment. On the other side, M3i includes Bluetooth wireless technology and 4-way adjustment handlebar.

2. Does the M3i spin bike include a media shelf?

Yes, it includes a standard media tray and stretch-pads for pre & post-ride stretching.

3. What are the maintenance tips for the M3i indoor cycle?

  • Wipe off the sweat after each session
  • Check and re-torque crank arms and pedals, weekly for the 1st month
  • Clean with warm water and a soft towel, weekly
  • Check the console for low battery life, weekly (pedal until the computer “wakes up”. If the battery is low, a “LO-BA” will be displayed)
  • Wax those areas most in contact with sweat, monthly
  • Lubricate adjustment handle threads, monthly

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