Ultra4racing.com recently posted an overview of the different racing classes now in play this 2015 season. The sport has grown so much, I find review posts like this helpful to stay on course, and as such wanted to share it with you here. Original post can be found at http://ultra4racing.com/uncategorized/ultra4-class-differences/ , and as stated there, if you plan on building a rig for Ultra4 don’t rely on this summary post alone, read the official Rule Book. Read more…