The M3i is the culmination of over a decade of refinement of the M3 and hundreds of changes, from mastering the flow of sweat around the bike and better corrosion resistance to a power meter so accurate that it was the first indoor cycling bike to pass the EN957-10 European Standard for accuracy and safety. But we didn’t stop there!
It wasn’t good enough to have just one sample bike pass the test, we implemented a quality control and testing program to ensure that every bike we produce will pass the test.
The M3i continues to raise the bar with the introduction of Keiser Integrated Technology and its ability to transmit to multiple Bluetooth® devices at once; transmitting your workout data to your cell phone or tablet at the same time it is sending the information to the class projection system and any other Bluetooth® device you want.
Features
- V-shaped frame to accommodate riders of all body shapes and sizes
- Magnetic resistance for a smooth and quiet workout
- Infinite incremental resistance changes
- Rear-wheel design for protection from sweat and corrosion
- Transport wheels for ease of transport
- Revolutionary re-designed Keiser Bike Pedal
- Self-tensioning, zero maintenance Poly-V® Belt Drive for low maintenance and reliability
- Intuitive, simple to read console displaying cadence, power, Kcals, heart rate, ride time, odometer, trip distance, and gear, all on one screen
- Keiser Integrated Technology: advanced connectivity for the gym and your home
- EN957-10 certification for power accuracy, safety and environmental friendliness
- Robust adjustment knobs that require less maintenance than cam-locks
- Four-way adjustable seat
- Four-way adjustable handlebars
- Media tray, stretch pads, water bottle holder

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.

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.

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.

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 horizontal adjustments of seat and handlebars, in addition to vertical.
- 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.

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.

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 to adjust for legs, torsos, and arms of different sizes.

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.

Designed for Magnetic Resistance.
We designed the industry's first indoor bike with magnetic resistance and we designed a drivetrain to go with it. Then, we added it to our elliptical.
The key to the M5 Series drivetrain is its single Poly-V belt. It transmits high loads over very small pulleys. This enables M5 Series ellipticals to achieve a smooth and quiet experience.

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.

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.

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.

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.

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 via Bluetooth® to popular fitness and cycling apps, as well as major group cycling projection systems. Easily sync your data post-ride or in real time.
- Connect with heart rate monitors Provides real-time heart rate data with broad compatibility across Bluetooth® monitors, including chest straps, watches, armbands, and other wearables.
- 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.
| Height | 49" / 1245 mm |
| Width | 26" / 661 mm |
| Depth | 51" / 1296 mm |
| Weight | 92 lbs / 42 kg |
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