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Keiser M3i Indoor Cycle with Bluetooth Computer

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Keiser M3i

Keiser introduces intelligent cycling and the most technologically advanced indoor cycle.

The company that revolutionized indoor group cycling with magnetic resistance, the first bike with a computer and who made power an industry training standard, now introduces the most technologically advanced indoor group cycle ever, the Keiser M3i featuring Bluetooth wireless display. The new Keiser M3i Bluetooth wireless computer is certain to become popular with both riders and group exercise instructions.

The computer can partner up with a wireless phone or tablet and with its new black color scheme that also features a red flywheel guard that is sure to turn heads. Keiser also unveiled new Bluetooth capabilities with the M3i. To compliment their new Bluetooth technology, Keiser will now offer a new group exercise projection system, the Keiser M3i (see video below). The new Bluetooth wireless display computer can transmit to a receiver for projection onto a screen and can also partner up with a wireless phone or tablet. Doing away with the conventional rider-worn monitor, rider data will be transmitted wirelessly via Bluetooth to reflect the performance of the rider, making the M3i the most technologically advanced indoor cycle ever. 

Download the Brochure HERE



New Innovative Pedals:


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

Optional 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.



Your indoor cycling workouts can now take on all new terrain. The M Series Converter with Bluetooth® Smart wireless technology enables in-home riders to connect to the road virtually with cycling apps previously unavailable to indoor cycling bikes. Programming includes workout plans and road courses that mimic the intensity of outdoor riding.

Keiser M Series Converter Installed

Keiser M Series Converter Installed

Maximize the Bluetooth potential of your new M3i with the new M Series Converter! This device converts the Bluetooth Smart signal of our M3i into the Power Profile used by apps normally reserved for indoor trainers. You'll have access to the most popular apps for indoor cyclists like Zwift, The Sufferfest, BKOOL and many others.

The M Series Converter connects Keiser’s M3i and M5i Bluetooth Smart technology into standard Power Profile data for use with apps designed for indoor trainers. This provides additional multi-level applications and exercise programs that mimic the feel and intensity of road cycling.

The M Series Converter converts Keiser's Bluetooth data into the Power profile format used by road bike trainers. This provides additional multi-level applications and exercise programs that mimic the feel and intensity of road cycling. Cycle apps like Zwift, Sufferfest and PainCave are used primarily by those who work out from home since they don’t require further software customization.


The converter itself is a small device the size of a Polar H7 heart rate monitor. It attaches to the backside of the media holder and runs on a coin cell battery. The battery lasts approximately 3 months.

Keiser M Series Converter

Keiser M Series Converter


The converter turns on when it detects any motion on the bike. It will start scanning for bikes and pair with the first bike it finds. So when you insert the batteries for the first time, make sure you’re ready to ride. Once paired, it will maintain the connection to that bike until you’re done exercising and the bike’s computer shuts off.

To start the device again, double tap the device. It will automatically search and connect to the bike it was first paired with. To pair the device with another bike, simply open the device and pull out the batteries to reset the connection. Proceed with starting the pairing process again with the new bike.

Keiser M Series Converter Installed with Bike ((Bike sold separately, Rider not included)(Bike sold separately, Rider not included)



Keiser M Series Converter App



The Keiser M Series Converter Updater app expands capabilities through wireless updates. Simply follow the in-app instructions to update your M Series Converter with the latest firmware, improving battery life and enhancing stability.

Keiser M Series Converter AppGoogle Play App Storeapple app store logo



  • Instructions
  • Battery
  • 2 pieces of hook and loop adhesive tapes
  • Display Sticker


What's included with the Keiser M Series Converter

What you'll get in the box


Keiser M3i Specifications:


Resistance System Eddy Current Magnetic Resistance System
Seat Adjustment Four-Way Adjustable Seat
Transport Wheels on base of frame for easy transport
Water Bottle Holder Yes


Display Backlit
Displays RPM, Power Output in Watts (currently generating), Heart Rate (Polar Compatible), Pedaling Time, Gear (1-24 Gears), Odometer, Trip Distance
Wireless Technology Bluetooth Wireless Technology

Technical Information:

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


Parts 3 Years / 6 Month Wearable Parts

3 Reviews Hide Reviews Show Reviews

  • 5
    Keiser 3Mi

    Posted by Garth Klimchuk on August 30th 2020

    Extremely quiet and well made. Easy to assemble with good instructions. Could not be happier. So much so I own two of them - in primary residence and second home. I have ridden this and Peleton and this bike towers over Peleton at a better price.

  • 5
    Excellent bike!

    Posted by Mary Annette Johnson on March 2nd 2020

    I am a cycle instructor at a local gym that has the Keiser bikes. I was excited to see that they were consistently rated at the top of ratings lists when I decided to shop for a bike for at home. My husband and I both love it. It is very high quality and sturdy. We have had these bikes at the gym where I work for over 8 years and have had very little maintenance needed. They are all still in service and function like new with 6 classes a week plus.

    My only complaint with the ones at the gym was the handle bar adjustment. The new version of the bike addresses that issue so that you can move them forward and back and not just up and down. Perfect!

    We cycle to various apps or just watch TV. We did not want a bike that had a fancy computer with a linked in subscription.This gives us the flexibility of not being tied to one company/app.

    It came with a HR strap which my husband uses, but it also connects flawlessly to my MyZone HR system that I use at the gym.

    Seat is comfortable without the gel cushion. It is adjustable. Bike is very quiet. Everything about it is top notch.

    Also, it wasn't that hard to assemble. I would pay for the delivery to bring it inside though.

    Very satisfied customer. Would highly recommend!

  • 5
    Excellent bike!

    Posted by MayBee on October 25th 2019

    Years of spinning, and this is the nicest bike I’ve been on. Smooth. Good app interface. Does not disappoint.



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