DONT THINK SO!! they are totally not efficient. I have a friend that has run the Zinger Pros on an H9 edge(with Moki 1.8), and he then went to Bambula, and the vertical was soooooooooo much better is blew us all away.

As for a 20x8 on the 1.8, i think that is too big. Id go with an 18x8 or an 18x6.