Aluminum Alloy

QS138 3000W V3 5500W Max continuous 72V 110kmh 115 KPH IPM with 1:2.37 gear box Mid drive Motor conversion kit with EM150-2SP ControllerFor138 motor powertrain kits, it could be used for electriclight motorcycle, which could be 72V100KPH.e.g. Dirt bikeE-motorcycle weight, approx 128kg+2*80kgSpeed: continuous 100km/hGear ratio: 1:3 (single steps transmission )Climbing slope: 25°@5kph @208kgBattery: 72V40hTire: 130/70-17 QS138-C 3000W Mid Drive Motor (1:2.36 reduction gear box inside)1) Motor Brand: QS Motor2) Motor Type: 138 BLDC Permanent Magnet Motor, PMSM3) Motor Design: Mid Drive with Single Axle4) Motor Shaft: Spline Shaft.5) Magnet: strong V magnet 70H.6) Diameter of Motor: 162mm7) Length of Motor: 231mm.8) Power: 3000W9) Recommended Work Voltage: DC 72V.10) Rotating: maximum 1900rpm – 2500rpm (after reduction)11) Maximum Speed: 80km/h to 100km/h.12) Torque: 35N.m to 55N.m.13) Maximum Torque: more than 120N.m after reduction.14) Maximum Efficiency: 92%15) Waterproof Grade: IP54.16) Net Weight: 12.3kgs (27 lbs).The 19:45 reduction gear box inside, much easily for double step transmission with better acceleration. Shipping and feedback 1. Please check your name, address, and phone number is right.2.Shipping time:Economy shipping from United States warehouse(By FedEx).Handing time:About 7 business days.3. After you place a order, we will ship out your goods as soon as possible, please check the tracking timely.4. If you can't find the tracking, please let us know, we will provide a positive feedback to you.5.We will be appreciated of that you leave us a 5 star feedback if you are satisfied with our goods.6.If you have any problems with our goods, please contact us first!!! We will do our best service to help you.7.Any questions, don't hesitate to contact us.