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Keiser M3i Indoor Bike

The Keiser M3i is found in renowned gym facilities across North America. Its durability can match riders of all body shapes, heights, and weight, handling all intensity workouts.

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A true road-bike indoors, the Keiser M3i has a unique design and makeup that you will only find on Keiser bikes. Its sporty yet ergonomic seat is adjustable, which allows for a better seating position that fits users from 4’10 to 7 feet tall. The Keiser brand, German-designed and American-made, is known for quality manufacturing.



V-Shape Frame

The V-Shape design mimics different bike frames by enabling the user to adjust seat and handlebars to be raised in conjunction with one another and fit longer or shorter legs, torsos, and arms.


Rear-Fly Wheel Design

Instead of putting the flywheel directly under the rider’s sweat zone and other vulnerable mechanisms, it’s located on the rear of the bike. This makes it easier to clean and is better protected from sweat and corrosion.


Keiser M Series Pedal

Use your favorite standard workout shoes with the built-in toe clip straps on the M3i. Or, flip the pedal over to use your favorite cycling shoes with popular SPD cleats. The pedal provides superior comfort, safety, and durability.


Magnetic Resistance

The Poly-V belt is the key to Keiser’s drive-train design because it transmits very high loads over very small pulleys, achieving a good road-bike experience:

  • Without a perimeter-weighted flywheel
  • Without a more complicated drivetrain
  • Without the unnecessary noise and vibration of a cog belt


The belt’s pre-tension design requires zero adjustments, and the M3i drivetrain requires no maintenance other than routine inspection.


M Series Saddle

The M3i comes with a saddle that includes 4-way adjustability, providing a classic road bike experience for a wide variety of users.


Keiser designed their adjustable seat mount to fit all standard bike saddles. This gives you the option to add your choice of saddle for that truly perfect fit.


If all you want is a little more cushion, you can easily add a comfort seat cover to the saddle that comes with the M3i.

Feature Overflow

  • Media Tray included for tablet or phone device
  • EN957-10 certification for power accuracy, safety and environmental friendliness
  • Robust adjustment knobs that require less maintenance than cam-locks

Product Overview


Ideal For
Ideal for users that are 4’10 to 7 feet tall, with a max weight of 350 lbs.
Not recommended for users over 350 lbs. Not for users looking to connect devices or apps through Bluetooth
Assembled Dimensions
Height: 49” / 1245 mm, Width: 26” / 661 mm, Depth: 51” / 1296 mm, Weight: 92 lbs / 42 kg
92 lbs / 42 kg
Space Requirements
There should be a clearance of no less than 24 inches (0.6 m) of free area on all sides of the bike.
It has two wheels for easy transport.


Console Display
Back-lit display: Automatically turns on when the room light drops below a set level and remains on, unlike other bikes
No physical buttons
Eliminating inconvenience and a cause of wear and maintenance
Add M Series Converter
You’ll need an M Series converter to connect a device via Bluetooth.
Resistance Type
Magnetic Resistance
Transport wheels
For ease of transport
Rear-wheel design
For protection from sweat and corrosion
Poly-V® Belt Drive
Self-tensioning, zero maintenance Poly-V® Belt Drive for low maintenance and reliability
Device Holder
Yes. The media tray provides a convenient spot for reading material or personal electronics and is standard on the Keiser M3i Indoor Bike.
Yes. The water bottle holder is incorporated into the frame design, fitting both small and large sizes.


Your Keiser M3i Bike will arrive partially assembled and only takes about 45 minutes to assemble.
All Inclusive - 3 Years (Excluding labor and wearable parts). Wearable Parts - 6 Months (Wearable parts include: "T" Handles, Pedal Cage, Pedal Strap, & Saddle Upholstery)
Maintenance Requirements
Maintenance after every ride is recommended. Thoroughly inspect your cycle and wipe off all sweat.
Service & Repairs
Fitness Town Service offers experienced maintenance and repairs for this product.

Compatible Apps

With the add-on of the M Series Converter (sold separatly), you can access popular fitness apps through Bluetooth connection.

Peloton App
YouTube Free
Trainer Road

Detailed Specifications

49” / 1245 mm
26” / 661 mm
51” / 1296 mm
92 lbs / 42 kg
Shipping Dimensions
Box dimensions measure 65” x 32”
Keiser Fitness Logo White


For over 40 years, Keiser has been changing the way people of diverse ages and abilities exercise, while helping to improve their performance and quality of life. Since its inception in 1977, Keiser has always been at the cutting edge of the fitness industry and remains there today with a full range of fitness produ cts for the young and the young - at - heart. We are proud to partner with Keiser because of their close alignment with our mission of keeping everyone moving at every age and any stage .


Buyer’s Guide

Why you should bring Cardio Equipment home?

  • 4-season / 24HR training safely – No limitations or concerns due to weather or time-of-day
  •  Reduced or controlled impact for injured, recovering, or aging bodies
  • Steady/safe/controlled terrain for injured, recovering, or aging bodies
  • Health benefits of cardio exercise equipment include: improved heart/cardiovascular health, lower blood pressure, helps to regulate blood sugar, can reduce asthma symptoms, can reduce chronic pain, can aid in sleep, increases daily caloric burn to reduce fat, can strengthen the immune system, shown to boost your mood, contributes to a reduced risk of falls.

Buying a Bike

Fitness Town has curated a range of quality bikes that pass various tests from our team of experts. After decades in the fitness industry, we’ve developed a good understanding of your needs, regardless of age or fitness level. We consider everything like industry standards, diverse physical statures, and training requirements and goals. When you buy a product from Fitness Town, you can feel confident knowing that it lives up to our high standards. All that’s left is finding the perfect match for you.
Here are some things to consider when comparing our bikes:

  • What are the different types of bikes? Covering the most important question first. It’s important you understand the types of bikes on the market to determine which one is right for you.
    • Spin (or indoor cycling) bikes will mimic a road bike the closest. These bikes feature a flywheel design with adjustable resistance that is usually controlled with a twist knob. With spin bikes, you have the option to choose magnetic or friction resistance. Magnetic resistance will feel the most natural and give a smooth ride. Friction resistance will be found on less expensive bikes and is increased by creating pressure on the flywheel with a felt pad. This type of resistance will wear out faster than magnetic resistance, but it will definitely get the job done.
    • Upright bikes also mimic traditional bicycles, but some users find them slightly more comfortable for steady-state cardio. These bikes will have a wider, more padded seat and resistance is generally controlled with buttons rather than a knob.
    • Recumbent bikes are the most supportive and feature a wide, contoured seat that provides coverage for the lower and middle back. The pedals are placed farther in front of the body, which allows the rider to slightly recline while pedaling. This type of bike is great for physical therapy.
    • Finally, air bikes (or dual-action bikes). As indicated by its name, these bikes use air resistance to control the intensity. They feature a large fan wheel and wide handles that move back and forth as the user pedals, allowing for upper body engagement. This model offers “unlimited resistance” – the harder you push, the more challenging the workout becomes.
  • What are your training goals? Someone recovering from knee surgery will most likely pick a different style bike than a CrossFitter. If you are looking for a bike to help you ease into a training routine, recover from an injury, or perform low-intensity, steady-state cardio, then you might want to go with an upright or recumbent bike. If you are looking for a heart-pumping, high-intensity workout that will burn a lot of calories, the air bike or the spin bike would be your go-to.
  • Your weight and the weight of the bike: Manufacturers post maximum weight limits to keep you safe. It’s important that your bike is stable. If the bike wobbles or shifts back and forth during your ride, this not only puts excessive wear and tear on your machine but is also a safety hazard. Check the weight limit on the bike, but also the weight of the bike itself. The heavier the bike is, the sturdier and more stable it’ll be during your ride.
  • Will you ride when the house is asleep? Even though you like to train at 5 AM, your housemate might not appreciate that early morning wake-up call. It’s important to note when purchasing a bike that the different types of resistance methods will also produce different levels of noise. If you cohabitate or enjoy watching tv while you ride your bike, you might want to pick a bike that offers a nearly silent ride.
  • Will it fit your height? If you’re tall and need extra leg room, or you’re on the shorter side and need to bring the handlebars closer, it’s important to consider the bike’s adjustability. We recommend one of our bikes with customizable seat and handlebar heights if you want to accommodate individual preferences.
  • Cool features: Finally, cool features. These are what we’d call “nice-to-haves”. The considerations above are important features to narrow down your options. Other factors like a display screen, workout programs, and heart rate connectivity are not essential, but they will help you decide on the perfect bike to fit you and your goals. Just remember, your bike purchase doesn’t need to be swayed by a cool connected fitness app or program. Nowadays, you can use these apps with any bike, so focus on finding the one that’s the right quality and price for you.



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Expert Guidance To Help You Choose

Fitness equipment is highly personal and studies show that the right fit has a big impact on your consistency, enjoyment, and success. The Fitness Town Difference is our commitment to fitting you with equipment that will go the distance. We want you to build an environment for fitness that removes barriers and makes it easier for you to move more, at any age and every stage. Let us help you discover what moves you.

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