Important NOTE: This item is for the bike that uses the hub diameter less than 36mm. This item doesn’t include battery or charger. This is our newest kit for electric common bike, this kit mounts the sprocket on the wheel spokes, so it fits most of bicycle wheel. Motor use freewheel so when wheel rotating, the motor will not rotate, just like a normal bike, this can reduce resistance. The twist kit includes: 1. 1x 250W 24V brush motor with freewheel 2. 1x Customized sprocket & components 4. 1x Motor controller 5. 1x Mounting plate + bolts 6. 1x Twist throttle (with battery indicator & key switch) The thumb kit includes: 1. 1x Mounting plate + bolt. 250W 24V Electric Bike Left Side Drive Motor Kit Mountain Bike Conversion Custom. Welcome(?’?’?). This item is for the bike that uses the hub diameter less than 36mm. The twist kit includes. 1x 250W 24V brush motor with freewheel. 1x Customized sprocket & components. 1x Mounting plate + bolts. 1x Twist throttle (with battery indicator & key switch). The thumb kit includes. 1x Wuxing thumb throttle (with battery indicator & switch button). Dieser Artikel ist für ein Fahrrad mit einem Nabendurchmesser von weniger als 50 mm. Dieser Artikel enthält keine Batterie oder Ladegerät. Freilauf des Motors verwenden Wenn sich das Rad dreht, dreht sich der Motor nicht wie bei einem normalen Fahrrad. Dies kann den Widerstand verringern. 1x 250W 24V Bürstenmotor mit Freilauf. 1x Customized Kettenrad und Komponenten. 1x Montageplatte + Schrauben. 1x Twist Gas (mit Batterieanzeige und Schlüsselschalter). 1x Wuxing Daumen Gas (mit Batterieanzeige und Schalter). Note: During installation, the two transmission wheels need to be adjusted to a straight line. The deviation of flywheel angle will tilt the flywheel stress point to one side, causing flywheel damage. The flywheel angle is generally adjusted through the mounting bracket of the motor. During installation, it is necessary to adjust the angle to ensure that the front and rear wheels are in a straight line. If the angle is not correct, it can be adjusted by adding or removing shims under the mounting plate at the axle position. If the front and rear wheels are not in a straight line, the chain will tilt to one side. This causes the force to tilt to one side all the time when the flywheel rotates, making it easy for the flywheel to be damaged. France, Germany, spain, Italy. Feedback is very important to us. It is impossible to address issues if we do not know about them! Please keep the original box or packaging within 15days since item received. Your satisfaction is our ultimate goal. We work hard to earn your trust and future business. A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it’s non-workdays, please kindly be patient and wait till Monday.