Which is better, bunks or rollers?

Bunks are well suited for watercraft trailers, low profile boat trailers, and pontoon trailers. Bunks will perform better than rollers in steep boat launching conditions as well as with larger boats. Bunks will often help steer your boat on to your trailer better than rollers. Bunks are a lower cost option than rollers and will not hold up as long as rollers under normal conditions.