yes you cant have low profile tyres for rallying really, 13" wheels are the best. and when they get to a track where they know they need a bit more top end speed, instead of changing to 4th gear they would fit 14" steels/alloys to make 3rd a higher speed. 5th gear is never used lol. thats for the cars with no short ratio box due to regulations, the micra with the short box must really fly, with a max top speed in 5th of about 90mph i think.