I was going to do more research on this first. AFAIK, the rear tire is designed for braking and accelerating forces. The front is only designed for braking forces. But I was thinking that for low power bikes, it was not going to matter much. I could be wrong but I have not asked the forum this question. Maybe someone with better knowledge can chime in. The size is better suited for the rear but the price I got it for, I was ok with it.