Originally Posted by merlinextraligh
It's all about momentum. true rollers, go hard at the bottom of the descent, carry the speed into the first part of the hill, and standup and hammer up the last part of the hill, rather than gearing down(or at least not gearing down much). Pedal over the top. Recover on the first part of the descent, and then repeat. By definition, rollers are hills that are short enough to honk up out of the saddle with the aid of the momentum from the last descent. If the momentum of the descent doesn't get you a good way up the next hill, they're not rollers.
I agree, I live in Gerogia, and there is nothing but short tough hills. Theres no flat where i live. My technique is exactly what merlin said. I get momentum and get out of the saddle when i lose momentum on the hill. I always do these in the big ring.