WERD. So after more than a year and a half of riding my large Spitfire and dealing with lower back pain... at Thredbo on the weekend it was suggested I should try an XL frame. I'm 6'3 and the fit and feel is good on the large for the most part pedalling around, but I guess I do feel like my head is a bit too far forwards when in 'attack' position and jumps can feel like I am a bit too big for the frame. And of course there's the lower back pain. Using a 50mm stem and 760mm wide/38mm rise bars. No steerer room to get the stem higher, and don't really like the bars to have any higher rise than they already have. I rode the next day on my Makulu which is essentially an XL (1 inch longer than the production L frame) and everything felt fine (50mm stem, 800mm wide bars/15mm rise). Anyone else suffered similar issues? Did a frame size change help? Did something else help? Should I sell off the large frame and seek out an XL?