M3i LITE INDOOR BIKE

engineering.
technology.
data.
Connected.

Model 5503

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M Connect Display

All the data a rider needs. connected.

All the data you need

Displays RPMs, watts, kcals, time, distance on a single screen.

Send ride data to devices

Connects with many popular fitness apps and cycling apps. Also connects with all major group cycling projection systems.

Connect with heart rate monitors

Displays live heart rate data using popular 5 KHz heart rate monitors.

24 Gears

Designed to match the number of gears on many high-end road bikes.

Interval training

Easy to start and stop intervals by pushing the gear shifter all the way down and back up.

Checkout Keiser’s new Studio Display with Ride by Color and a variety of new features on the new M3i Studio Plus.

share data with two or more devices at the same time.

Share your data with compatible heart rate monitors, projection systems and fitness apps.

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Compatible with a variety of health 
and fitness apps

The M Connect Display can send your cadence, speed, power, and heart rate data to fitness apps.

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Compatible with all major projection systems

The display can send rider data to leading projection systems — including Keiser M Series Group App. But while connected to a projection system, it can also share data with apps on a user's smartphone or tablet at the same time.

Easy leasing available.

The Keiser Ecosystem

Rider. Bike. Data. Content. Connected.

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

Apps for Studios

M SERIES GROUP APP

Lead engaging, informative FTP-based group classes.

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 based on your profile data.
  • Capture and save your full workout history.
  • Guided workout sessions.
  • FTP testing and estimation tool.

Try our equipment. We’ll Bring it to you.

Commercial Pricing?

M3i LITE INDOOR BIKE

Engineered to perform.
Built to last.

Innovative engineering. Solidly reliable. And simply, a better ride.

Proven Durability. Lowest Cost of Ownership over time.

Made in USA with domestic and globally sourced material.

Features

Specifications

  • V-shaped frame to accommodate riders of all body shapes and sizes from 4’10” to 7’ tall.

  • Magnetic resistance for a smooth and quiet workout.

  • Infinite incremental resistance changes.

  • Rear-wheel design for protection from sweat and corrosion.

  • M Series Pedal designed to meet the needs of group indoor cycling demands.

  • Self-tensioning Poly-V® belt drive for low maintenance and reliability.

  • Robust adjustment knobs that require less maintenance than cam-locks.

  • Four-way adjustable seat.

  • Two-way adjustable handlebars.

  • Media tray, stretch pads, water bottle holder.

  • Transport wheels for ease of transport.

Height

44" / 1118 mm

Width

26" / 661 mm

Depth

51" / 1296 mm

Weight

87 lbs / 40 kg

Commercial Pricing?

V-Shaped Frame

Matches riders from 5' to 6’2"

(1524 mm to 1880 mm) tall with a weight capacity of 350 pounds (159 kg).

Road-bike frames vary 
to fit riders of different sizes.

Keiser’s v-shaped frame mimics the sizing of different road-bike frames.

The M3i Indoor Bike's seat and handlebars adjust for legs, torsos, and arms of different sizes.

Commercial Pricing?

Rear-Flywheel Design

More reliable. Better protected.

Sweat can lead to corrosion, additional maintenance, and shorter bike life.

Keiser moved vulnerable mechanisms out of the “sweat zone”

By moving the flywheel to the rear, Keiser moved the bike’s drivetrain and other vulnerable parts out of the rider’s “sweat zone.”

  • Reduces the need for more maintenance.
  • Protects against corrosion.
  • Extends the life of the bike.

Commercial Pricing?

EN957-10

Every day, an M3i production bike is randomly dyno tested to ensure quality and accuracy.

True power readings

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

Guaranteed Consistency

Our relentless quality control procedures ensure that every M3i delivers the same immediate accurate ride data, bike after bike after bike.

Poly-v Belt Drivetrain

a quiet, smooth, Road-bike experience
— and no maintenance.

The Poly-V belt is perfect for transmitting high loads over very small pulleys.

designed for magnetic resistance.

We designed the industry's first indoor bike with magnetic resistance. And we designed a drivetrain to go with it.

The key to the M3 Series drivetrain is its single Poly-V belt. It transmits high loads over very small pulleys. This enables M3 Series bikes to achieve a good road-bike experience with a lightweight, aluminum flywheel.

Poly-V Belt

The choice of automotive manufacturers

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

No required maintenance, zero adjustments

  • Pre-tension design requires zero adjustment.
  • Drive-train requires no maintenance other than routine inspection.

Avoids the problems of many indoor bike designs

  • No heavy, perimeter-weighted flywheel.
  • No complex, multi-belt drivetrain.
  • No unnecessary noise and vibration of a cog belt.

Commercial Pricing?

Curved crank arms to fit every rider

We curved the crank arms on our indoor bikes to fit a wider variety of riders and their workout shoes.

M Series Pedal

Tested for over 30 million cycles
at 290 lbs and 120 RPMs

Built to withstand demands of group cycling

  • Stronger bearings tested for static and dynamic loads experienced when rider gets on, off, and rides the bike.
  • Forged chromoly steel axle heat-treated for maximum strength.
  • Standard workout shoes or cycling shoes with SPD cleats.

Guided Tour

The M Series Pedal

See how every detail is engineered to exceed industry standards. The result is not just a more user-friendly pedal. It's also a more durable commercial-grade pedal.

Commercial Pricing?

Easy to transport

With fewer parts, a lighter flywheel, and precise weight distribution, M3 Series bikes are very ease to move. And their small footprint makes them easy to place and store.

M3i LITE INDOOR BIKE

Quick, Easy, and Convenient By Design.

Large, easy-turn height adjustment: Oversized knobs are easy to loosen and retighten. Pin plunger design is simple to operate, secure, and require less maintenance that cam-locks.

Easy-to-adjust seat and handlebars: Quick, intuitive vertical handlebar adjustments as well as vertical and horizontal seat adjustments.

Stretch pads: Facilitate pre- and post-ride stretching.

Simplified maintenance: M Series drivetrain can be accessed by removing only eight screws versus over three times more on some competitors’ bikes.

Water bottle holder: Fits both large and small water bottle sizes.

Easy-access shifter: Handlebar-mounted design is easier and safer to operate — especially when riding out of the saddle. And the lever design is more intuitive and easier to operate than many knob-based designs.

Standard media tray: Removable media tray holds mobile phones and tablets.

Questions? Ask a rep.

Our nationwide team has a Keiser representative near you.

Get pricing

Request a price quote.

Ask about financing options

Easy business leasing available. Learn about attractive options that may be available to you.

Try our equipment

Your local rep can bring one of our Mobile Showrooms to you. Learn more.

Consult our cardio experts

Our market sector specialists understand your needs and have the answers for your questions

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