Airdynes
Model Number
AD8 - for 220V countries
AD7 - for 110V countries
AD7 - for 110V countries
AD6i - for 220V countries
AD6 - for 110V countries
AD6 - for 110V countries
AD2i - for 220V countries
AD2 - for 110V countries
AD2 - for 110V countries
Resistance
Infinite levels of air resistance
Infinite levels of air resistance
Infinite levels of air resistance
Drive System
Single-stage belt drive / High-strength fan
Single-stage belt drive / High-strength fan
Single-stage belt drive / High-strength fan
Heart Rate Monitor
Telemetric / Works with any Polar® compatible 4.5kHz - 5.5kHz chest strap transmitter
Telemetric / Works with any Polar® compatible 4.5kHz - 5.5kHz chest strap transmitter
---
Display
Multi-display, high resolution LCD
Oversized, high contrast LCD
High contrast LCD
Display Readouts
Time / Distance / Calories / RPM / Watts / Pulse / Speed
RevMeter™ / Time / Distance / RPM / Calories / Power / Pulse
Speed / Distance / Calories / Time/ RPM
Seat
Fore and aft adjustments
Extra-padded, oversized seat
Extra-padded, anatomically correct seat
Water Bottle Holder
Yes
Yes
No
Weight
51.3 kg
115 lbs (52.2 kg)
44 kg
Maximum User Weight
160 kg
136 kg
113 kg
Power Source
2 D batteries, AC adapter ready
2 AA batteries, not included
2 AA batteries