I am running a 130/70-18 front on my v-star 950. I want to get some white wall tires but I can‘t find any in this size. I find many white walls in a 120/90-18. My question is; what is the main difference in these sizes. Is the 120/19-18 a wider tire or a taller tire? I think it will fit fine but I would like some reassurance before ordering.