I'm thinking about replacing the stem that came with my Soma with a nitto stem. They come in two sizes for handle bars 25.4 or 30.1. I'm pretty sure that the nitto bullhorns I have are 26.0 and the stem that I has is 26.0. Will the 25.4 size stem be too small? Will the 30 be too large. Also, it says that the stem fits a 1.125" steerer, mine is 1". Will this cause a problem?