More than 20 years ago, Keiser set out to create a bike that would exceed the demands of indoor group cycling.

• A 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
• The ONLY bike built in the United States to ensure the tightest quality control

...and we accomplished it all with

THE SIMPLEST OF

ENGINEERING DESIGNS.

SPECIFICATIONS

HEIGHT

45" / 1143 mm

WIDTH

26” / 660 mm

LENGTH

49” / 1245 mm

WEIGHT

85 lbs / 38.6 kg

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Thanks to the lessons learned from our past generations of bikes and our constant innovations, the Keiser M3i isn’t just any indoor group cycling bike.

It’s the industry’s only indoor group cycling bike built around YOU. That’s...

YOU the rider

YOU the gym owner

YOU the service technician

HERE’S HOW WE DID IT.

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MATCHES RIDERS

OF ALL SIZES

Many indoor group cycling bike manufacturers talk about providing a road-bike experience, but they failed to recognize what’s important about road bikes:

FRAMES VARY TO ACCOMMODATE RIDERS OF DIFFERENT SIZES.

Our solution was to engineer the industry’s FIRST V-shape frame for an indoor bike

Our V-shape frame design allows the M3i to mimic different road-bike frames by allowing the seat and handlebars to be simply raised in conjunction with one another to adjust for longer legs, torsos and arms.

The M3i matches riders from 4’10” to 7’ (1473 mm to 2233 mm) tall with a weight capacity of 350 pounds (159 kg).

Other indoor group cycling bikes mistakenly place the rider’s sweat zone directly over the flywheel and other vulnerable mechanisms — an obvious engineering flaw that leads to corrosion, excessive cleaning and a shorter bike life.

Keiser was the FIRST to put the flywheel at the rear of a bike, allowing the M3i to be more reliable, easier to clean and better protected from sweat and corrosion.

Further protection of drive-train

The angled channel on the bike frame flows excess fluid away from the drive-train.

Less maintenance, longer bike life

With superior sweat protection, gym owners can save money through lower maintenance costs and a longer bike life.

It’s easy to “claim” accuracy, but we guarantee it. As the FIRST company to use magnetic resistance, Keiser revolutionized indoor cycling by delivering a quiet, reliable ride with immediate accurate data for EVERY M3i bike.

And unlike most competitors’ bikes, the M3i has been certified for accuracy

The nerve center of the M3i

The simple, elegant axle assembly is the core piece responsible for predicting and delivering accurate ride data, EVERY TIME — and EVERY COMPONENT is inspected to meet precise tolerances.

TRUE POWER READINGS

The M3i is the FIRST indoor bike to receive the globally recognized EN957-10 certification for accuracy and safety.

IMMEDIATE RIDE DATA

The FIRST indoor bike designed to predict the power generated at any speed in any gear — ensuring that both instructors and riders are provided with accurate ride data immediately.

GUARANTEED CONSISTENCY

Our relentless Quality Control procedures ensure that every M3i delivers the same immediate accurate ride data, bike after bike after bike. And every day an M3i production bike is randomly dyno-tested to ensure quality and accuracy

The competition endorsed Keiser’s engineering by following our lead on using magnetic resistance — but they should have also copied our drive-train design.

Our simple drive-train, with just a single Poly-V belt, produces the higher speeds necessary for a lighter-weight aluminum flywheel to provide the kinetic energy and magnetic resistance to simulate a good road-bike experience. Using an outdated drive-train, designed for heavier flywheels, our competitors must use a perimeter-weighted flywheel to accomplish the same thing.

They even brag about their perimeter-weighted flywheel, cog-belt drives or crank-arm-to-flywheel ratios. But what they’re really telling you is...

THEY DESIGNED

THEIR BIKE WRONG.

No required maintenance, zero adjustments

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

The Poly-V belt is THE choice of automotive manufacturers

The Poly-V belt is the preferred choice to run the accessories on the front of car engines, because it’s so quiet, durable and reliable.

Many indoor group cycling bike manufacturers talk about the distance between their bike’s two pedals, and boast about their narrow Q Factor. But their bikes were built around the narrow shoes and pelvises of elite cyclists, even though footwear of any width and people of all body shapes can be found in group cycling classes.

WHY WOULDN’T YOU DESIGN A BIKE TO FIT

EVERYONE?

CURVED CRANK ARMS

TO FIT WIDER HIPS AND BULKY SHOES?

Instead of using straight crank arms to achieve a narrow Q Factor, Keiser recognized the need for versatility. We added curvature to the M3i crank arms to maintain the proper distance for wider hips and any type of rider footwear, from narrow bike shoes to the bulkier gym shoes most commonly worn in group classes.

THE REVOLUTIONARY

KEISER M SERIES PEDAL

Keiser also set a new industry standard with our SPDcompatible M Series indoor group cycling bike pedal. Engineered beyond consumer standards for group classes, it’s more than a pedal — it’s a game changer, providing superior comfort, safety and durability.

The M3i features a wide array of details, benefits and features, offering additional fit and comfort for riders, enhanced durability for gym owners, and simplified upkeep for maintenance technicians.

Simplified maintenance

M3i drive-train can be accessed by removing just eight Phillips head screws vs. over three times more on some competitors’ bikes.

Standard media tray

For holding cell phones and tablets

Easy access to shifter

Mounted directly to handlebars for ease of use and increased safety, especially when riding out of the saddle. Interval training is activated by simply pushing the shifter all the way down and back up, making it ideal for HIIT workouts.

Water bottle holder

Incorporated into frame design and fits both small and large sizes

Easy-to-adjust seat and handlebars

Quick, intuitive vertical and horizontal adjustments of seat and handlebars.

Robust knobs

Requiring less maintenance than a traditional cam-lock.

Wide array of hand positions

Continuous design of handlebars provides multiple hand positions for indoor cycling.

Stretch pad

Located on bike base to facilitate pre- and post-ride stretching.

Easy to transport

Fewer parts and a lighter flywheel for ease of transport.

THE M3i FITS RIDERS

FROM 4'10" TO 7' UP TO 350 POUNDS

The v-shaped frame allows the seat and handlebars to be adjusted for adult riders of almost any size. Horizontal adjustments provide further ability to get a perfect fit for any rider

"MY SON IS 6'10’ AND A COLLEGE ATHLETE SO WE NEEDED A DURABLE BIKE THAT WOULD ADJUST TO FIT HIS HEIGHT. THIS BIKE WAS PERFECT. I LOVE THAT WE CAN EASILY ADJUST BOTH THE SEAT AND HANDLE BARS TO GIVE EVERYONE IN OUR FAMILY A PERFECT FIT. "
Nancy Kreiner | Okoboji, IA

THE M SERIES PEDAL

WORKOUT SHOES OR SPD CLEATS

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. To use another cleat style, simply replace the pedals with your choice of standard bike pedals (9/16" x 20 TPI) that accept your desired cleat.

M3i Indoor Cycle - Keiser introduces intelligent cycling and the most technologically advanced indoor group cycle ever, the Keiser M3i featuring Bluetooth wireless display. The new Keiser Bluetooth wireless computer is certain to become popular with both riders and group exercise instructors.

The computer can transmit to a receiver for projection onto a screen and can also partner up with a wireless phone or tablet. At first glance the Keiser M3i catches the eye with a sexy new black color scheme that also features a red flywheel guard.

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

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.

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

"VERY EASY TO ASSEMBLE"
Leila | Hollywood, FL

"I AM MOST CERTAINLY NOT HANDY, BUT IN NO TIME I WAS RIDING ON THE BIKE"
Steve | Raymond, ME

"LOVE LOVE LOVE! THE M3I WAS SO EASY TO PUT TOGETHER. THANK YOU."
Chris | Lincoln, NE

Introducing the M3i Studio Indoor Bike

Boldly step into the future of indoor cycling with the innovative M3i Studio Indoor Bike, featuring a revolutionary new display in Model 5508. Engineered to perform and built to last, this indoor bike offers a seamless fusion of engineering, technology, and content connectivity.

SKU: 005508BBC

Features:

New Studio Display: Experience a better ride with the all-new Studio Display, introducing Ride by Color™ with full-color feedback to track FTP and HR zones customized for five, six, or seven power zones.

• Ride by Color™: Full-color feedback for tracking FTP and HR zones.

• Personalized Metrics: Input your information for personalized metrics and new ways to track intensity.

• 72 Gears: Enjoy more gears for easy resistance level adjustments.

• No Cords, No Batteries: Powered by Keiser's pedal-powered generator and super capacitor for a lifetime of power.

• Latest Connectivity: Connects seamlessly to apps and devices via ANT+™ and Bluetooth® CSCS, CPS, and FTMS.

Track Intensity Four Ways: Switch between modes during your ride for a three-dimensional ride experience.

• 5, 6, or 7 FTP Zones: Enter your FTP for Ride by Color™ FTP zone display. Choose five-, six-, or seven-zone options.

• Heart Rate: Enter your HRMax and pair a heart-rate monitor for Ride by Color™ HR display.

• METs: Track exercise intensity using METs on an indoor bike.

• Speed: Access speed mode to track exercise intensity by speed (MPH or KM/H).

Compatible with a Variety of Health and Fitness Apps: The Studio Display can send cadence, speed, power, and heart rate data to fitness apps, syncing with devices using ANT+ and Bluetooth® CSCS, CPS, and FTMS.

Connects with More Heart Rate Monitors: Bluetooth® and ANT+ compatibility for enhanced connectivity.

Compatible with All Major Projection Systems: Send rider data to leading projection systems while simultaneously sharing data with apps on a user's smartphone or tablet.

The Keiser Ecosystem: Connect the workout to the digital world through a seamless universe of engineering, technology, and content.

Virtual Indoor Cycling Classes:

• The Ride: Ride with world-renowned instructors on-demand at home.

• The Ride Studio: On-demand class content with features for studios.

• For All Riders M Series App: Graphic real-time ride data, personalized metrics, full workout history, guided workout sessions, and FTP testing and estimation tool.

M3i Studio Indoor Bike: Engineered to perform and built to last, featuring:

• V-shaped Frame: Accommodates riders of all body shapes and sizes from 5’ to 6’2” tall.

• Magnetic Resistance: Provides a smooth and quiet workout.

• Infinite Incremental Resistance Changes: Tailor your workout with ease.

• Rear-Wheel Design: Protection from sweat and corrosion.

• M Series Pedal: Designed for group indoor cycling demands.

• Self-tensioning Poly-V® Belt Drive: Low maintenance and reliability.

• Robust Adjustment Knobs: Require less maintenance than cam-locks.

• Four-Way Adjustable Seat: Customizable for various riders.

• Two-Way Adjustable Handlebars: Accommodates different arm positions.

• Media Tray, Stretch Pads, Water Bottle Holder: Convenient features for an enhanced workout experience.

• Transport Wheels: Easy to move and store.

Specifications:

• Height: 44" / 1118 mm
• Width: 26" / 661 mm
• Depth: 51" / 1296 mm
• Weight: 87 lbs / 40 kg

V-Shaped Frame: Matches riders from 5' to 6’2" tall with a weight capacity of 350 pounds.

Rear-Flywheel Design: Moved vulnerable mechanisms out of the “sweat zone” for reduced maintenance, corrosion protection, and an extended bike life.

Poly-V Belt Drivetrain: Ensures a quiet, smooth, road-bike experience with no maintenance.

Poly-V Belt: The choice of automotive manufacturers for its quiet, durable, and reliable qualities.

Curved Crank Arms: Designed to fit a wider variety of riders and workout shoes.

Tested for Over 30 Million Cycles: At 290 lbs and 120 RPMs, built to withstand the demands of group cycling.

Easy to Transport: With fewer parts, a lighter flywheel, and precise weight distribution, M3 Series bikes are very easy to move and store.

M3i Studio Indoor Bike - Quick, Easy, and Convenient by Design:

• Large, Easy-Turn Height Adjustment: Oversized knobs are easy to loosen and retighten.

• Pin Plunger Design: Simple to operate, secure, and requires less maintenance than cam-locks.

• Quick, Intuitive Horizontal Adjustments of Seat: In addition to vertical adjustments.

• Stretch Pads: Facilitate pre- and post-ride stretching.

• Simplified Maintenance: M Series drivetrain accessible by removing only eight screws.

• Water Bottle Holder: Fits both large and small water bottle sizes.

• Easy-Access Shifter: Handlebar-mounted design for easier and safer operation.

• Standard Media Tray: Removable tray holds mobile phones and tablets.

The M3i Studio Plus Indoor Bike, Model 5509, combines the legendary M3i with an innovative new display, offering riders an enhanced experience. With its advanced features and connectivity options, it promises a superior workout session tailored to individual needs.

Features

• New Studio Display: The updated display provides full-color feedback, allowing riders to track FTP and HR zones with Ride by Color™ technology.

• Personalized Metrics: Users can input their information to receive personalized metrics, facilitating better tracking of intensity levels.

• 72 Gears: With a wider range of gears, riders can easily adjust resistance levels to find the perfect setting for their workout.

• Pedal-Powered: The bike features Keiser’s pedal-powered generator and super capacitor, eliminating the need for cords or batteries and ensuring a lifetime of power.

• Latest Connectivity: Compatible with ANT+™ and Bluetooth® CSCS, CPS, and FTMS, the bike can connect to various apps and devices for enhanced functionality.

• Four Ways to Track Intensity: Riders can switch between modes during their session, offering a versatile and immersive workout experience.

• Compatible with Health and Fitness Apps: The Studio Display can sync data with fitness apps, sharing cadence, speed, power, and heart rate information.

• Connects with Heart Rate Monitors: Supports Bluetooth® and ANT+ heart rate monitors for accurate tracking of heart rate during workouts.

• Compatible with Projection Systems: The display can transmit rider data to leading projection systems, enhancing the group exercise experience.

• Keiser Ecosystem Integration: Seamless integration with the Keiser M Series App allows for real-time ride data, personalized metrics, workout history tracking, and more.

Specifications

• Height: 49" / 124.5 cm
• Width: 26" / 66.1 cm
• Depth: 51" / 129.6 cm
• Weight: 92 lbs / 42 kg

Keiser M3 Cycle has never settled for the status quo. The new Keiser M3 Indoor Cycle is no exception. We scrutinized and quality-tested every single component, from the top of our dual-placement handles to the bottom of our rock-solid base and absolutely everything in between. The Keiser M3 Indoor Cycle is a great bike to train on in your home.

Keiser M3 Indoor Cycle is an award-winning, third-generation indoor cycle. The result of more than a decade of research and manufacturing experience, and developed with the collaboration and feedback of trainers and some of the largest fitness clubs worldwide. The Keiser M3 has been a first choice purchase for several years for many cycle studios!

The hallmark of the Keiser M3 Indoor Cycle is its durability. The Keiser M3 Indoor Cycle is made of corrosive resistant materials, has a resistance system that doesn’t wear, and is virtually maintenance free; requiring less work from your facility to keep it running. All of this, plus it is backed by one of the best warranties in the industry.

Keiser M3 Indoor Cycle has never settled for the status quo. The new Keiser M3 Indoor Cycle is no exception. Keiser scrutinized and quality-tested every single component, from the top of the dual-placement handles to the bottom of the rock-solid base and absolutely everything in between. The Keiser M3 only weighs around 110 lbs. so moving it is a snap with the transport wheels.

Keiser M3 Indoor Cycle with Console Features

• Adjustable Shimano Combo Pedals
• Easy Transport
• Gravity Based Water Bottle Holder
• Dual Placement Comfort Handles
• Four-Way Adjustable Seat Position (Up, Down, Forward, and Backward)
• Adjustable Handlebar Height
• Anti-Slip Belt (Requiring No Adjustment)
• Non Wear Magnetic Resistance
• Easy to Install
• Infinite Resistance Adjustment
• Smooth Resistance Shifter
• Comfortable Saddle
• Optional Computer System
• Virtually Maintenance Free
• Unprecedented Warranty
• Whisper Quiet
• Computer (Optional)

Keiser M3 Indoor Cycle: New Feature! While the M Series Computer is awake, the Backlight Sensor automatically detects ambient light levels in the room and turns on the Backlit Display when needed on the Keiser M3 Indoor Cycle.

The Keiser M3 Cycle Computer is a powerful teaching and programming tool. It can assist both the instructor and the participant by providing immediate feedback as well as the ability to track on-going improvement. The Keiser M3 Indoor Cycle Computer can be used as a motivating tool to engage participants in their workouts, as the more participants understand the components of a proper workout, the further they can fine tune their performance. RPM (Revolutions Per Minute) | Power Output Displays in Watts (currently generating) and Kilo Calories (Total for the ride) | Heart Rate (Polar compatible) | Pedaling Time | Gear (Resistance) (1 to 24 gears) | Trip Distance.

The Keiser M3 Cycle Computer displays:

• Backlight Sensor
• Cadence (RPM)
• Power Output (Watts/Kcal)
• Heart Rate (HR)
• Elapsed Time
• Current Gear (Resistance Level)
• Odometer / Trip Distance

Keiser M3 Indoor Cycle with Console Specifications

• Height: 45” / 1143 mm
• Width: 26” / 660.4 mm
• Length: 49” / 1244.6 mm
• Weight: 85 lbs. / 38.56 kg

Keiser M3i Total Body Trainer

In 1996, Keiser embarked on a mission to create an Indoor Cycling Bike that would surpass the demands of group cycling classes. The result was the M3 Indoor Bike, a revolutionary product that not only exceeded expectations but also transformed the industry with innovations like magnetic resistance, V-shaped frames, and a rear-flywheel design. Committed to excellence, all M Series Cardio Products adhere to Keiser's stringent standards, ensuring the finest in quality, service, and performance. The Keiser Integrated Technology leverages Bluetooth® connectivity to record and track progress through the M Series Apps.

SKU: 005512BBC

Performance in Real Time

The M3i Total Body Trainer (TBT) was developed to meet the rigorous demands of athletic performance, integrating an upper body component into the proven M3i platform. Ideal for those seeking a comprehensive full-body workout, it enables training for upper and lower body simultaneously or independently, including single limb rehabilitative movements. The Keiser Integrated Technology empowers coaches to monitor athletes' performance in real time on a smartphone or tablet, with the ability to retain data for progress tracking.