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.


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

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. It shouldn’t be built for gym owners, either. Nor should it be built for maintenance technicians. Rather, a truly great indoor group cycling bike should be built for all three. But how can you even tell? Download The Biker's Dozen to learn more.


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.


MORE STRENGTH WHERE IT'S NEEDED MOST

KEISER M SERIES BIKE PEDAL

Keiser once again revolutionizes indoor cycling down to the last detail with our game changing bike pedal. Because detail is never optional.

  • The cage is integrated into the design of the pedal, not just added on
  • Ramped barbs allow for secure foot placement without insertion difficulty
  • Curvature of the pedal matches typical shoe design, eliminating pressure points on the rider's foot
  • Stronger bearings tested for static and dynamic loads experienced when rider gets on, off, and rides the bike
  • Pronounced edge allows rider to easily flip pedal and insert foot
  • Easily accessible SPD tensioning adjustment
  • Flexible and strong axle design that evenly distributes stress load. Forged, chromoly steel axle, machined and heat treated for maximum strength
  • Re-angled SPD clip position provides greater clearance between the cage and the ground when using the SPD clips
  • Secure strap design to prevent slipping when tightening and excessive wear

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

FREQUENTLY ASKED QUESTIONS

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

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

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

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

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

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

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Do you offer payment plans?

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I have other questions. Is there a number I can call to speak to an actual person?

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What is the warranty for Keiser M Series indoor bikes?

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Will my Keiser M Series indoor bike require assembly?

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What are "kcals"?

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What if my bike is damaged during shipping?

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

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

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Do you ship to APO/FPO addresses?

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*** Does free shipping cover Alaska and Hawaii?

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

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

OPTIONS

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-ride stretch.

STRETCH PAD

Stretch Pad provides a convenient place for a pre-ride stretch.

MEDIA HOLDER

Media Holder provides a convenient spot for reading material or personal electronics.

MEDIA HOLDER

Media Holder provides a convenient spot for reading material or personal electronics.

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™.

BKOOL PREMIUM CYCLING SIMULATOR

Enjoy a FREE 3-month trial of the BKOOL Premium Cycling Simulator with the purchase of an M3i. BKOOL is the most advanced simulator on the market, which seamlessly pairs with your indoor bike and features 3D virtual scenery, multi-player options, streaming route videos and more.

BKOOL PREMIUM CYCLING SIMULATOR

Enjoy a FREE 3-month trial of the BKOOL Premium Cycling Simulator with the purchase of an M3i. BKOOL is the most advanced simulator on the market, which seamlessly pairs with your indoor bike and features 3D virtual scenery, multi-player options, streaming route videos and more.

KEISER METRICS

Take fitness analysis to the next level by combining the data captured by Keiser machines with data from fitness tracking devices for unparalleled insight into your performance and progress. Users can also sync information from the M Series App to view all data in one convenient location.

KEISER METRICS

Take fitness analysis to the next level by combining the data captured by Keiser machines with data from fitness tracking devices for unparalleled insight into your performance and progress. Users can also sync information from the M Series App to view all data in one convenient location.

ACCESSORIES - OPTIONAL

INTELLIGENT PROJECTION SYSTEM

The Keiser Intelligent Projection System utilizes the advanced Bluetooth® Smart capabilities of the M3i Indoor Cycle, M5i Strider, and the M3i Total Body Trainer to offer real time performance monitoring and data collection.  Ride statistics are continuously displayed on screen in various formats controlled by the instructor to match the intended ride experience.  Following the ride, users can access their data online to review and compare against previous sessions, as well as to share with other performance monitoring platforms. 

INTELLIGENT PROJECTION SYSTEM

The Keiser Intelligent Projection System utilizes the advanced Bluetooth® Smart capabilities of the M3i Indoor Cycle, M5i Strider, and the M3i Total Body Trainer to offer real time performance monitoring and data collection.  Ride statistics are continuously displayed on screen in various formats controlled by the instructor to match the intended ride experience.  Following the ride, users can access their data online to review and compare against previous sessions, as well as to share with other performance monitoring platforms. 

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. 

TALK TO A SALES REP TODAY