NEW VERSION TSDZ2 Torque Sensor Central Motor. No Throttle, No Brake, Front light and light cable included. Built-in Controller and both side torque sensor. High efficiency, low battery power consumption, safety long riding. HOW DO I KNOW IF THE MID DRIVE CONVERSION KITS WILL FIT MY BIKE?The Mid Drive Kits are designed to fit bikes with a 68mm 2.68 in. Or 73mm 2.87 in. Wide bottom bracket shell and 35mm inside diameter. This encompasses the vast majority of bikes excluding some newer high end bikes with an Integrated Bottom Bracket. This item is in the category "Sporting Goods\Cycling\Bicycle Components & Parts\Electric Bicycle Components". The seller is "auto-ebike" and is located in this country: CN. This item can be shipped worldwide.