Wow!! California actually doesn't have a law that another state HAS? I'm writing my congressman. But i can't do it via my cell phone while driving because of the cell phone law...and even if i could, the glare through the window's the law prohibits me from tinting is too much...DAMNIT!:|errWow! Even CA doesn't have a law THAT specific! All the tire has to be is load-rated for the lbs and have designated minimal tread-depth for steering (4/32) and drive(s) (2/32).
Never hear of a trailer-specific tire law.