Ok I'm 5'8", 31" inseam. I ride a 55cm frame and the stem I have now is 90mm long. I feel fine on this set up, no back or neck pain from the position. The stem I have now is a typical road style stem as far as angle goes. The Jaguar has a pretty steep drop, a 58 degree angle I believe. I plan on running a NITTO B201AA Riser bar and it has 50mm rise. I suppose it should compensate for the drop some. Now, will I need to get a different length stem or is 90mm sufficient?