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 Quick release remote shifter 7 levels of resistance Tire Drive 24 - 29 x 1.75` 7 levels BlackUPC/EAN/GTIN: 4944924406790