This default motor is with thread, fitting for thread freewheel. If you need the rear cassette motor, the extra cost USD10 will be charged. The front or rear wheel kit, the product same as below image. 1 36V 250W/350W/500W brushless gear hub motor with Rim (tire not included). 36V dual mode controller with bag.Black Aluminum Alloy Brake Levers(pair). 8 Magnets Pedal Assistant Sensor. Hydraulic brake sensor - (If required, the additional cost USD10 will be charged). Thumb throttle (if required, please leave a message to us). BZ-4(8)- 8 magnets PAS. KT-D12- 12 magnets PAS (If you need 12 magnets PAS, the extra cost USD3 will be charged). This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Electric Bicycle Components". The seller is "cscwheels" and is located in this country: CN. This item can be shipped worldwide.