hub motor gearbox for e bikes

{"cid":"91225520","title":"Hub Motor Gearbox With Electronic 3-Speed Shifting For OEM E-Bikes","imgUrl":"https:\/\/img.chinax.com\/nimg\/3a\/f3\/d6b0b71687f63786657d2f136215-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"ELEVANDI","Model Number":"R900","Minimum Order Quantity":"TBD","Delivery Time":"<20days","Rated Voltage":"36V DC","Protection Rating":"Protection Rating","Supply Ability":"Ten thousand sets per month","Model":"R900","Payment Terms":"T\/T,PayPal,L\/C,D\/A,D\/P,Western Union,MoneyGram","Maximum Torque":"50 N\u00b7m","Rated Power":"250W \/ 350W","Application":"Urban E-Bikes \/ Cargo E-Bikes \/ Smart Mobility Platforms","Certification":"RoHS,REACH","Place of Origin":"GUANGZHOU,CHINA","Packaging Details":"1pcs\/carton","Shifting System":"Electronic 3-Speed Integrated Shifting","Smart Algorithm":"Adaptive shifting based on speed, torque, cadence, and slope","Shifting Performance":"Shifting Performance","Product Type":"Integrated Hub Motor & 3-Speed Electronic Gear System","Maximum Efficiency":"\u226578%"}}