Bike Fridays pocket rocket wont sacrifice speed like the Dahon.. which does not sell a bigger frame for 2 M tall people.

BiFri has 8 different sizes , still stows in a suitcase, to travel to Meets.

you can spec it with what ever components floats your boat.

I'd suppose the sponsoring organization for the race series is the place to ask about the allowability of a 451 20" wheel ..