1.There are 2 main types of electric bike kits.
Electric Bike Wheels conversion kits
It is the most common type of conversion kit. Changing one of your wheels to a powered wheel is what most people tend to do when using a conversion kit to make a powerful bike.
Mid-drive Conversion kits
You can mount the electric motor and the battery onto your bike’s frame, and this will help you achieve a balanced ride. Mid-drive conversion kits can be used on any type of bicycle.
2.Motor
If you are going to use the bikes for leisurely rides or commuting to work, 250w/350w motor is enough. If you want to tackle mountain trails or the sea beach, you should choose a 500w motor at least, and 750w motor is a better choice.
3. It is very important to consider the Warranty.
Many electric bike conversion kits come with warranties, which support parts like the motor after your purchase.
4. When buying online, check to see whether or not a conversion kit comes with a battery; many do not, and you’ll have to purchase one separately.