convert mountain bike to electric

{"title":"Wilder Terrain Electric Mountain Bike Conversion Kit Front Wheel Ebike Conversion Kit","imgUrl":"https:\/\/img.chinax.com\/nimg\/03\/b8\/71ea2d6eae050f2d57f58508c490-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"BONEN","Minimum Order Quantity":"1 set","Delivery Time":"5-10 days","Place of Origin":"China","Packaging Details":"Carton+foam","Payment Terms":"Paypal,T\/T,Western Union","Voltage":"72V","Motor Power":"3000W","Rim wheel":"28'","Controller":"24 MOSFETs"}}

{"title":"Fat tire electric bike conversion kit for mountain e-bike","imgUrl":"https:\/\/img.chinax.com\/nimg\/f1\/db\/12591feca9de17702484fbcd2ed3-200x200-1.jpg","attrs":{"Price":"$150.00 - $250.00 \/ Set","Brand Name":"OEM","Minimum Order Quantity":"1 Set\/Sets","Part":"Other","Place of Origin":"Jiangsu, China","Product Name":"Fat Motor Kit","Motor":"Brushless Gearless","Voltage":"48V","Power":"3000W","Display":"LCD","Throttle":"Thumb Throttle","Wheel size":"20\"-28\"","Warranty":"1 Year","Battery":"Optional Lithium Battery","Supply Ability":"3000 Set\/Sets per Month","Packaging Details":"1set \/carton","Port":"shanghai"}}