I don’t know why step-via frames aren’t more popular, especially for this kind of applicaiton, but Tern definitely gets it. This is 72V 8000W Ebike Conversion Kit for electric bike, electric Unwanted fat bike, electric mountain bike and electric enduro bike with a very good quality and powerful functionality. https://cruzqfova.blogocial.com/rumored-buzz-on-20-60v-2000-watt-brushless-motor-ebike-63008937