Magnetic bike 1.flywheel:4.2kgs 2.scanning, time, speed, distance,calorie 3. 8levels magnetic system Magnetic bike 1) Whisper quiet and smooth workout2) Heavy duty for stability and durability3) Functions: scanning, time, speed, distance,calorie4) Quick release knob for seat post, height adjustable5)outside magnetic control system6)8 levels magnetic resistance fitness equipment magnetic bike