I'd say it depends when you go, as well as you and what bike you ride. I've done it on my KLR, up and down, with Pirelli Scorpions, MT90's (prolly a 70/30 tire) and no problem, but it wasn't as wet as in this video. I've done it on the DRZ, both with Scorpions, as well as D606's. When it's muddy, the knobbies are nice. Downhill is probably a little easier, ESP up at the top.