You can raise the bars on a mountan bike by using a stem with a long extension and a steep angle. This is a 135mm stem with the steepest angle I could find. Your stem is probably 1 1/8" like mine. You can tell by comparing it to a quarter. If the stem is the same diameter as a quarter, it's 1 1/8". If it's smaller than a quarter. it's 1". A long stem like a Technomic is not a good idea for a mountain bike.