Keiser M3i Indoor Cycling Bike Review

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Keiser M3i Indoor Cycling Bike Review

The Keiser M3i Indoor Cycling Bike is among the latest and very popular cycling bikes that are worth considering for either home use or commercial use. It is among one of the best indoor cycling bikes for the year 2021 that has entered the spinning bike and indoor bike segment.

This bike is also one of the first indoor bikes to have a Bluetooth wireless computer. When involved in group classes for exercises, the information from the computer in the M3i can be shown on a display. The rider can also download their statistics via an app, from the computer to either their tablet or smartphone.

The Keiser M3i is also very innovative, especially in the testing of the accuracy of its power display. It is the first indoor cycling bike to clear the EN ISO 20957-1 certification that is offered by a European Safety Organization by the name, TUV Product Services.

This certification ensures that you will get accurate feedback related to the workout in + 10%. Just like the Keiser M3 Plus Indoor Cycle Bike, the Keiser M3i Indoor Cycling Bike is not known for its sleek and attractive design, but also its impressive and innovative technology.

The seat, as well as handlebars, adjust easily and quickly and have an unusual pull-pin system that is not found in other cycles.

The handlebars have four-grip positions that are good for varied riding positions. Read through our Keiser M3i Indoor Cycling Bike Review 2021 to know all about this indoor bike.

Best Suited to Whom?

The Keiser M3i Indoor Cycle Bike is very durable and sturdy and is best suited for spinners. This exercise bike is designed for commercial use. However, this can be used in homes or health clubs as well.

It can be adjusted to different user heights. The 24 levels of resistance offered by this bike make it suitable to people of different fitness levels for either cardiovascular training, weight loss, or even toning the muscles of the lower body.

Keiser M3i Indoor Cycling Bike Assembly, Design and Build Quality


The Keiser M3i Indoor Cycling Bike arrives partially assembled. The main portions that the user will have to assemble are the flywheel, the frame, the crank arms, console, and the pedals. The entire process would require around 2 hours.

You must ensure that you follow the instruction manual well, as in case you do not follow it, and this results in any kind of damage to the cycle, it will not be covered under the warranty. Also, ensure you have all the required tools to assemble the Keiser M3i Indoor Cycling Bike.

Design and Build Quality

The exercise bikes from Keiser are quite popular for the quality as well as durability. They are mostly used in commercial gyms for cycling. The Keiser M3i Indoor Cycling Bike is a high-quality bike that comes with a heavy flywheel that is rear-mounted and gives the user the feel of riding a bike.

As the flywheel is located at the rear, it is well-protected from sweat. This indoor cycle from Keiser offers a great cardiovascular workout that has a low impact on the joints of the user.

Keiser indoor bikes can be used by many users especially in spin classes or health clubs, as these have been designed for commercial use. It is definitely the best indoor cycling bikes for home use as well due to its frame made of heavy-duty steel and aluminum.

The colors used in this bike are red and black which makes it all the more attractive. The frame has a V-shape that makes it very convenient for the rider to get on and off the bike. It is a low-maintenance bike.

The base of the bike comes with four feet that offer the much-required stability, especially on uneven areas. You can also use a mat beneath the bike for additional protection to the floor.

The Keiser M3i tops the list of best looking indoor cycle bikes in the market. The colors used, the flywheel that is rear-mounted, the aerodynamic design, along with many other features are created to impress.

The seat, as well as handlebars of this bike, can be customized and adjusted just by pulling a pin. The resistance system used in this bike is the eddy current magnetic resistance that makes sure the rider faces a very smooth transition while changing gears.Keiser M3i Indoor Cycling Bike Review

Keiser M3i Indoor Cycling Bike Features


The Keiser M3i comes with an LCD that has a light sensor at its top. This turns on in dark areas and if the room is well lit to read the data on the display, it will stay off.

This ensures the battery lasts longer. However, the display is not a touchscreen one and does not come with buttons. When the crank arms move, you can view the details of the workout.

The console has some additional features:

  • Set up for Interval training
  • Bluetooth – data storage
  • Set up for Bike ID
  • Set up for Mile and kilometer
  • The display also shows the gear shaft as well as the current gear. This feature is usually not found in most of the spin bikes.

Adjustable Saddle

The seat of the Keiser M3i can be replaced easily and is quite comfortable in contrast to other spin bikes. The seat can be adjusted as per the height of the user. The rider has to loosen the levelers that are behind the seat.

The seat can be adjusted in 4 ways – fore/aft, up and down. This enables the user to select the position that is most comfortable to him/her. The rider can also keep the seat between the two holes midway and tighten the adjustment knob.

Caged Pedals

M3i Indoor Cycling Bike has re-designed pedals that have been created to be very comfortable. The rider can workout using either normal athletic shoes or cycling shoes as the pedals come with both the cage as well as SPD.

The pedal curvature matches the normal shoe design, thereby getting rid of the pressure points on the foot of the user.

Water Bottle Holder

This indoor cycle has a water bottle holder that has been conveniently fixed to the frame. This makes it quite easy for the rider to get hydrated while working out.

Adjustable Handlebars

It comes with handlebars that have been designed in a very unique manner in comparison to other spin bikes. It has an ergonomic shape that does not place a lot of strain on the back.

It also gives the rider a good view of the phone/tablet screen when they are kept on the tray. The handlebars can be adjusted in 4 different ways to suit distinct heights. They are:

  • Overhand front position
  • The Hook/middle position
  • The Extended position
  • The Time trail position


It comes with 24 magnetic resistance levels that are suitable for any range of cycling – easy, medium or intense training. Many of the spin bikes available in the market come with just 20 levels of resistance.

It has the Eddy Current magnetic system that ensures no parts touch the flywheel and the transition between gears is very smooth and quiet.


The bike comes with a flywheel of 8-lbs and is made of steel. Even though all the M Series bikes of Keiser come with a flywheel weighing 8 lbs, they ensure the rider gets the most natural ride.

Self-Generating Power

The Keiser M3i cycle needs a couple of AA batteries for its LCD. The batteries last for quite a long time on this bike due to its back-lit sensor.


(i) Bluetooth Technology: This is the first spin bike that integrated Bluetooth technology. This was the only feature that was missing in the Keiser M3 Plus Indoor Cycling Bike. The rider can create their profile on the compatible applications and save all their workout statistics on it rather than manually saving the data.

(ii) Media Tray: The Keiser M3i Indoor Cycling Bike comes with a media tray wherein you can place your tablet or smartphone and have access to entertainment while you exercise.

You can also connect the device and check out your workout performance statistics on the display. The Keiser M3 Indoor cycle and the Keiser M3+ Indoor cycle do not have this feature.

Accessories include

  • Water bottle holder: A water bottle holder to keep you hydrated as well placed on the bike.
  • A set of AA batteries: you get a set of AA batteries along with the bike.

Accessories that are not included with the bike

  •  Wireless Polar heart rate monitors will have to be purchased by the user
  • Assembly tools
  • Indoor cycling mat to protect the floor

Keiser M3i Indoor Cycling Bike Workout Programs

The Keiser M3i Indoor Cycling Bike can be set up for interval training. This is quite a new feature on this bike. Also, there are a few apps that support the Keiser M3i Indoor Cycling Bike and other M Series bikes. They are:

1. The Keiser M3 Series Pro apps (both iOS and Android)
2. The Empowered BeTested (Only for Android)
3. The Empowered BeTrained (Only for Android)
4. The Ride Buddy Buckets (only for iOS)
5. GOInd (only iOS)

Some of the applications that are not compatible are:

  • Zwift
  • The Sufferfest
  • TrainerRoad
  • Peloton
  • CycleCast
  • Aaptiv
  • Studio Sweat On-Demand

Keiser M3i Indoor Cycling Bike Warranty

The manufacturer Keiser offers a warranty of 10 Years on the frame of the Keiser M3i Indoor Cycling Bike. It also offers a 3-year warranty on the display, processor box, and cylinder.

The compressor, dryer, pulleys, cables, bearings have a 2-year warranty. The chrome has a 1-year warranty. The paint, seat belts, upholstery, hand grips, other rubber parts, plastic products, etc. have a 90-day period.

The user must note that any loss or damage caused to the bike due to accident, misuse, neglect or improper user, improper maintenance, incorrect assembly, or even failure to understand the instructions provided in the manuals, will not be covered under the warranty.

Keiser M3i Indoor Cycling Bike Pros & Cons


  • The bike mimics a road bike very well
  • It offers 24 levels of resistance which is a wide range for a spin bike
  • It makes use of eddy current magnetic resistance that ensures a smooth and quiet operation
  • The seat is comfortable and adjustable
  • The handlebars can be adjusted in 4 ways
  • The bike has an LCD that displays important workout data
  • It comes with Shimano Combo Pedals (SPD)
  • The bike is powered by batteries and doe not need an electric supply
  • It has a water bottle holder and media tray
  • It is quite a compact bike which requires less space
  • The assembly process is easy
  • There are transport wheels for easy relocation
  • Excellent warranty is offered on the bike


  • The bike does not come with assembly tools
  • The does not have any preset workout programs
  • The handlebars might be uncomfortable for a few people
  • The odometer does not make use of miles
  • The bike does not have ANT+ connectivity required for fitness applications
  • It is very expensive above $2000


The Keiser M3i Indoor Cycling Bike weighs about 85-lbs and comes with two transport wheels made of silicon that ensures relocating the bike in the house or gym is easy. The dimensions are quite compact and this enables the user to store the exercise bike easily in the house without the need for a lot of space.

In contrast to rivals, this bike is quite lighter. It is simple, sturdy and durable and these features make it the best spin bikes 2021 available in the market. Though this bike might not fit everybody’s budget, it is worth the money.

The bike has been designed for comfort, offers safety, and is very attractive. If you are on the lookout for a good spin bike, the Keiser M3i Indoor Cycling Bike is worth considering.

FAQs of Keiser M3i Indoor Cycling Bike

How long does a Keiser bike last?
The user has to tilt the bike to roll it away. The assembly process is quite simple and easy and would need about 45 minutes. The purchaser gets a warranty of ten years on the frame, 3 years on parts and the remaining parts like the paint and upholstery have a warranty of 6 months.
Is the Keiser M3i indoor bike compatible with Zwift?
No. It is not compatible with Zwift. It transmits only on BLE.
What is the price of the Keiser M3i Indoor Bike?
The bike is priced at about $2000.