M Series Cardio

M3i INDOOR BIKE

More than 20 years ago, Keiser set out to create an exercise bike that would exceed the demands of indoor group cycling: An indoor bike that fits riders of all body shapes and sizes; a bike that achieves a quiet — but true — road bike experience inside your gym or home; and the ONLY stationary bike built in the United States to ensure the tightest quality control. And we accomplished it all with the Simplest of Engineering Designs.


KEISER M3i

VIRTUAL

EXPERIENCE

See how we built the bike through this exciting, interactive experience that guides you through all of the exacting specifications, wows you with exploded views of the bike’s innovative features and enlightens you with the science behind Keiser’s many industry firsts, proving why the M3i truly stands above the rest.


KEISER

INTERACTIVE

CYCLING

ENHANCE YOUR RIDES & INSTRUCTION WITH FTP TRAINING AND MORE FROM KEISER’S INDOOR CYCLING APPS AND GROUP CLASS SYSTEM

M Series
M Series Group
M Series Instructor

RIDER. OWNER. TECHNICIAN.

DESIGNED AROUND YOU

The Keiser M3i is the industry’s only indoor group cycling bike built entirely around YOU – that’s YOU the rider, YOU the gym owner and YOU the service technician. Game-changing features on the M3i include:

  • V-shape frame to accommodate all riders
  • Rear-wheel design for protection from sweat and corrosion
  • Magnetic-resistance technology for greater repeatability and reduced wear
  • Quiet, reliable and low-maintenance single-belt drive train
  • Revolutionary re-designed Keiser Bike Pedal
  • Bluetooth® wireless signal for open API for tablets and smartphones

KEISER INDOOR BIKE COMPUTER

ALL THE DATA YOU NEED ON A SINGLE SCREEN

We designed the M3/M3i Indoor Bike computer to be simple, with everything a rider needs to know on a single screen. This includes RPM (Revolutions Per Minute), Power and Energy (Watts and Kilcalories), Heart Rate, Elapsed Time, Gear and Trip Distance. Additionally, the back-lit display turns on when the room light drops below a set level and – unlike other indoor bikes – remains on.


13 THINGS TO LOOK FOR WHEN BUYING AN INDOOR GROUP CYCLING BIKE

THE BIKER'S DOZEN

Who exactly should an indoor group cycling bike be built for? It shouldn’t be built for riders. Or gym owners. Or maintenance technicians. Rather, a truly great bike should be built for all three. But how can you tell? Download The Biker’s Dozen to find out.


PUSHING PAST INDUSTRY LIMITS

KEISER M SERIES BIKE PEDAL

With our game-changing bike pedal, Keiser has again revolutionized indoor cycling down to the last detail. New pedal features include:

  • Stronger bearings tested for static and dynamic loads
  • Cage integrated into pedal design, not just added on
  • Ramped barbs for secure and simple foot placement
  • Curvature eliminating pressure points on the rider’s foot

THIS GROUP OF HIGH-END STUDIOS PROMISES A BEST-IN-CLASS RIDE.

SEE HOW THE GAME-CHANGING KEISER M3I HAS DELIVERED THAT PROMISE.


“THINK I'M ADDICTED! MY HUSBAND SAYS I AM!”

4.69AVERAGE RATING 5 279

279 Reviews

Verified Purchase

CAROLYN ROAN , Dalton, GA
Fascinating how the bike came shrink wrapped and boxed! Had to unwrap it and carry it piece by piece up the stairs - pretty heavy! - so my husband could help me put it together, with the assistance of the helpful online video. Only one snag with an un-threaded bolt and that piece was quickly replaced by customer support. Really quiet, barely makes any noise! Very comfortable and adjustable for my body size (I'm about 5'6"). Very stable and doesn't rock at all. I am surprised just how fit I am from my old bike compared to the settings on the Keiser and what the instructors call out on Peleton. I'm not complaining though!! I appreciate the "extras" that were included in my purchase. I especially like the tank top. A bit challenging to initially set the BID number but I figured it out fairly quickly. One thing that is...
Read More Reviews

SPECIFICATIONS

 Height
45" / 1143 mm
Width
26" / 660 mm
Length
49" / 1245 mm
Weight
85 lbs / 38.56 kg    

FEATURES

  • Bluetooth® Wireless Technology
  • Automatic backlit digital display
  • V-shape frame and handlebar combo to accommodate all riders
  • Rust-resistant design includes stainless steel hardware and rear flywheel
  • Revolutionary re-designed Keiser Bike Pedal
  • Quiet, low-maintenance magnetic-resistance belt-drive system
  • Magnetic resistance delivers road-bike experience and ensures a smooth ride
  • Lightweight and superior ease of transport
  • With more than 300,000 M Series bikes sold, there’s no more proven bike worldwide
  • Robust adjustment knobs require less maintenance than cam-lock
  • Four-way adjustable seat
  • Water bottle holder
  • Keiser Education and Certifications available
  • Includes a standard media holder and stretch pads

FREQUENTLY ASKED QUESTIONS

plus

What is the difference between the Keiser M3, M3i, M3X and M3iX indoor bikes?

plus

Can I train heart rate on Keiser M Series indoor bikes?

plus

Which heart rate monitors are compatible with Keiser M Series indoor bikes?

plus

How does Bluetooth® wireless technology work on the Keiser M3i and M3iX indoor bikes?

plus

Are there differing commercial and residential versions of Keiser M Series indoor bikes?

plus

Are there used/refurbished Keiser M Series indoor bike models available?

plus

Can I finance exercise equipment for my home?

plus

What is the warranty for Keiser M Series indoor bikes?

plus

What are "kcals"?

plus

What if my bike is damaged during shipping?

plus

I'd love to buy an M3i but I live outside the United States. What are my options?

plus

I placed my order but haven't heard back yet, how can I check the status of my order?

plus

Do you ship to APO/FPO addresses?

plus

Why are the Keiser M3/M3i bikes designed with a light flywheel?

plus

Does the M3i include a media holder?

Keiser Demo Van

We'll bring the power of Keiser to you

DEMO UP TO 7 MACHINES IN 60 MINUTES –
AT YOUR FACILITY.

Request a visit from a NEW Keiser Demo Van and “Demo the Keiser Difference” – at the convenience of your own facility. In just one hour, you and your team can try out as many as seven Keiser machines, including Strength, Functional and Cardio.

Learn More

COMPONENTS

PAINT / UPHOLSTERY

Keiser offers numerous options to customize your equipment. With both upholstery color and frame painting options you can finally get the machine that suits your facilities needs or personal tastes. Lead time is required for most custom orders, please contact us for more information.

PAINT / UPHOLSTERY

Keiser offers numerous options to customize your equipment. With both upholstery color and frame painting options you can finally get the machine that suits your facilities needs or personal tastes. Lead time is required for most custom orders, please contact us for more information.

ACCESSORIES - STANDARD

STRETCH PAD

Stretch Pad provides a convenient place for a pre and post-ride stretching and is standard on the M3i and M5i.

STRETCH PAD

Stretch Pad provides a convenient place for a pre and post-ride stretching and is standard on the M3i and M5i.

MEDIA HOLDER

Media Holder provides a convenient spot for reading material or personal electronics and is standard on the M3i and M5i.

MEDIA HOLDER

Media Holder provides a convenient spot for reading material or personal electronics and is standard on the M3i and M5i.

KEISER M SERIES APP

Easily track and record your rides with real-time graphs for power and cadence range dials. More advanced users can add on the ability to test and track FTP directly within the app as well. The Keiser M Series Cycling App is available for Apple® or Android™ devices via the App Store® or Google Play™.

KEISER M SERIES APP

Easily track and record your rides with real-time graphs for power and cadence range dials. More advanced users can add on the ability to test and track FTP directly within the app as well. The Keiser M Series Cycling App is available for Apple® or Android™ devices via the App Store® or Google Play™.

KEISER M SERIES GROUP APP

With the Keiser M Series Group app featuring Functional Threshold Power (FTP) Training, indoor cycling instructors can enhance their teaching capabilities to easily transform classes into fun and fiery competitions that inspire riders and keep them coming back for more.

KEISER M SERIES GROUP APP

With the Keiser M Series Group app featuring Functional Threshold Power (FTP) Training, indoor cycling instructors can enhance their teaching capabilities to easily transform classes into fun and fiery competitions that inspire riders and keep them coming back for more.

M SERIES INSTRUCTOR APP

With the M Series Instructor App, instructors can view all the Keiser M3i bikes, M5i Strider Ellipticals and M3i Total Body Trainers in a group class in a single list, with options to sort and view live data in a simple scrolling view with options for sorting.

M SERIES INSTRUCTOR APP

With the M Series Instructor App, instructors can view all the Keiser M3i bikes, M5i Strider Ellipticals and M3i Total Body Trainers in a group class in a single list, with options to sort and view live data in a simple scrolling view with options for sorting.

ACCESSORIES - OPTIONAL

DUMBBELL HOLDER

Add an upper body workout to your ride. The optional Keiser M3/M3i Dumbbell Holder is designed to hold two hand weights weighing up to 5 pounds apiece and installs easily in minutes. 

DUMBBELL HOLDER

Add an upper body workout to your ride. The optional Keiser M3/M3i Dumbbell Holder is designed to hold two hand weights weighing up to 5 pounds apiece and installs easily in minutes. 

M3i TOOL KIT

Add the M Series Assembly & Maintenance kit to your order and get riding on day one. You'll receive everything you need to assemble and maintain your new bike, including the torque wrench and crowfoot wrenches.

M3i TOOL KIT

Add the M Series Assembly & Maintenance kit to your order and get riding on day one. You'll receive everything you need to assemble and maintain your new bike, including the torque wrench and crowfoot wrenches.

CONVERTER

For Home Use Only: Your M Series bike purchase allows you to virtually take your indoor cycling workouts to the road with the M Series Converter. Connect your Keiser M3i to more of your favorite applications like Zwift and Sufferfest for the ultimate road-bike experience.

CONVERTER

For Home Use Only: Your M Series bike purchase allows you to virtually take your indoor cycling workouts to the road with the M Series Converter. Connect your Keiser M3i to more of your favorite applications like Zwift and Sufferfest for the ultimate road-bike experience.

TALK TO A SALES REP TODAY

+1 559 256 8000 Speak to a sales representative

IS YOUR ORGANIZATION LOCATED IN:

Please select one of the following options

TO CONNECT WITH THE CORRECT REPRESENTATIVE, PLEASE TELL US WHERE YOUR ORGANIZATION IS LOCATED

Please provide a valid US ZIP Code

TO CONNECT WITH THE CORRECT REPRESENTATIVE, PLEASE TELL US WHERE YOUR ORGANIZATION IS LOCATED

Please select from one of the countries below

If you would like to conduct an advanced search to find your sales rep,  use the "Advanced Search" button below. Otherwise, fill out this form and we'll make sure it reaches the right contact!

ADVANCED SEARCH

YOUR KEISER REPRESENTATIVE


Stay Connected With Keiser

Notify me of Keiser Corporation news, events and offers via Email

Keiser will never share your personal information with third-parties

View our Privacy Policy

YOUR KEISER REPRESENTATIVE


TO CONTACT KEISER'S SERVICE DEPARTMENT PLEASE FILL OUT THE FIELDS BELOW. 

Stay Connected With Keiser

Notify me of Keiser Corporation news, events and offers via Email

Keiser will never share your personal information with third-parties

View our Privacy Policy