On my recently converted to single speed '91 Rockhopper comp, which I'm loving, I've got a Ritchey Fatbone stem and Ritchey Risers with one of those threaded to threadless converters. Despite tightening the hell out of everything, the front end flexes and creaks when I'm accelerating with my weight forward. I really like the position of the stem (80mm with 17 degrees of rise), but I can't seem to find something to replace it with that would be stiffer and stronger.
I tried an Azonic Shorty but at 75mm and only 10 degree rise I didn't like the position however it was stiff as hell and made a big difference. Anyone know a strong 80mm stem with 15-20 degrees of rise? Closest thing I've seen is a Thomson 90mm with 15 degree rise. Either threadless or threaded 1 inch quill will work.