My rtr 210 is very slow in a straight line compared to the others im racing against. Around the corners and shorter sections its fine but on the straight I have to move to one side and let everyone past haha.. I have just taken delivery of a 9.5T motor (the lowest turn the stock esc can handle), and fitting it as we speak! So im going to see how it fairs now before messing around with gearing as spur gears and pinions cost what, around 8 each, New 9.5T speed passion motor from rcmart 26 delivered
Maybe there is someone at your race meet who can point you in the right direction with gearing as it is going to differ from track to track.