Standard ferrite magnet Lightweight and adjustable power Generates 425 watt power at 40 km/h 0.6 kgs dual steel disc flywheel Fits hub width between 125 � 145mm Sturdy 29mm folding legs 3 levels of resistance Tire Drive 24` - 700C x 45 3 levels BlackUPC/EAN/GTIN: 4944924406783