More than 20 years ago, Keiser set out to create an exercise bike that would exceed the demands of indoor group cycling: An indoor 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; and the ONLY stationary bike built in the United States to ensure the tightest quality control. And we accomplished it all with the Simplest of Engineering Designs. RIDER. OWNER. TECHNICIAN. 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 ope