MTX39 Rim 135mm 72V 2000W motor+dual mode 45A controller conversion kit
Sun ringle MTX39 Double-wall alloy rims spoke (2.6mm spokes spoked by park tool). Engine: 72v 2000w Electric bike rear hub motor wheel (180°C copper winding+ Best magnet ). Upgrade your bicycle with this powerful 135mm 72V 2000W motor wheel conversion kit from NBPower.