I was doing some black and red runs in Italy (near grand st bernard I think).
I was riding my 140mm hardtail, and riding with some other guys who were all on 160mm full sus bikes. I could keep up with them for so long, and then they'd slowly pull away from me and I could never catch them back up. It felt like I couldn't go any faster then I was already going.
It just felt like every time I tried to put a bit more speed down the back would get ridiculously jumpy, trying to kick me off loads whenever it hit something. Obvious thing would be to pick a smoother line, but even on the smoothest lines I could see it still felt the same. Should I have put more weight forward? More weight back? Or had I found the bikes limit?