Get Greater Accuracy, Measurability, Durability & Adjustability – The Keiser M3i

Over 20 years ago, Keiser set out to create an exercise bike that would exceed the demands of Indoor Group Cycling classes.

It would be an indoor bike that fitted riders of all body shapes and sizes; a bike that achieves a quiet — but true — road bike experience inside; and the ONLY stationary bike built in the United States to ensure the tightest quality control.

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 match riders of all sizes
  • Rear-flywheel design for better protection from sweat and corrosion
  • Magnetic Resistance for a smooth and quiet workout
  • A self-tensioning, zero maintenance Poly-V Drive Belt
  • Revolutionary re-designed Keiser Bike Pedal
  • Bluetooth® wireless signal for open API for tablets and smartphones

Keiser M3i - Interactive Experience

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 Cadence, Power, Kcals, Heart Rate, Ride Time, Odometer, Gear, and Trip Distance.

Additionally, the high visibility, backlit console turns on when the light level is low and – unlike other indoor bikes – remains on.

Keiser cardio M pedal series

With our game-changing bike pedal, Keiser has again revolutionised 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


  • Keiser Integrated Technology using Bluetooth® connectivity
  • Automatic backlit digital display
  • V-shaped frame and handlebar combo to accommodate riders of all sizes
  • Corrosion-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 for 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-locks
  • Four-way adjustable seat
  • Four-way adjustable handlebars
  • Media tray Stretch pads
  • Water bottle holder
  • Keiser Education and Certifications available
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