Love this build although i have not seen it until now. Great build. What are your motor plans?
ATV rules: The width of the ATV will be considered legal provided that the wheels don't lift the spreader bar off the ground with the ATV in normal ride height, as the ATV is ridden between the 50-inch-wide spreader bar.
I had the same axle with 20x11-9 tech 4 sti tires and i was almost exactly 50"
Your extra 3" on each side will probably push you over the limit unfortunately.
Also if you actually race this i wouldnt want to be running stud spacers. IMO they are not safe, even though many people have not had a problem, i wouldnt feel safe hitting any type of jump with them.
