I started mtn biking when it was first becoming popular (yeah, I'm old!) Back then 600mm (26") bars were the usual. I still use a 26 with a slight rise and I think 9 degree sweep. Nothing says you have to use the newer, wider bars with less sweep. Many wide bars are pre marked for cutting. You just need to find what rise/sweep will work for you and cut a wide bar down a little at a time until you find the "sweet spot" that works for you. Because I've ridden the same type bar for decades, not sure if it's the best for me or I've just become used to it! Think I might like more sweep, but not riding lots of off road so the old bar is staying.