Coming from the Atom forum, there're lots of tyres threads, the general consensus are that both the Yoko and Toyo tyres are preferred, but Toyo also has a price advantage, both tyre patterns are the same but the Toyo has a more squarer profile than the rounded profile of Yoko. I had the Yokos on my Atom, and they were just unbelievable, Toyos are just as good according to other members, cares are needed tho when wet, or else you could be slithering towards the scenery at the first corner you come across

I had soft front and medium rear on my Atom, I'm guessing that for a much heavier Aero, it probably best to have hard all round.....
my 1/2 penny