That's what I'm running now. I went out riding last week with a friend of mine and there were a lot of hills - going up wasn't too much of a problem, as long as I knew that it was coming and could speed up for it. Having speed when you hit the hill helps a lot. I prefer sitting and grinding as long as possible, but had to stand and curse a couple of times.

Coming down the other side was a lot worse. Actually had to ride on the grass on the way down one hill to slow myself down. It was kind of funny though - I was waiting for my friend at the top of each hill, and he was waiting for me at the bottom....