The Cobalt 2, the Shock and the V2 are the main motors used fo on road. The Cobalt 2 and the Shock are probably the quickest but are harder to tune and need cuts more often (3 to 5). The V2 are not too bad for speed and and don't need cuts as often (5 to 7). The V2 are better for club but in high comp races the Shock and Cobalt 2 would be better.