The final part of purchasing an electric bike kit is to choose the correct rim size for your bike. This is a reasonably straightforward exercise as it is written on the sidewall of your existing tyres. Though there are a few caveats, you should know about as some tyre sizes are an odd measurement, but are compatible with the one rim size.
First, if your tyre says either 650b or 27.5” they will fit on the same rim size. Second, if your tyre reads 700C, 29er or 28” they will all fit perfectly on a 700C-sized rim. The only thing you will need to be positive about is if your current bike tyres are a 29er, they can sometimes have wider rims and hubs