TR wheels are great wheels! I have bought them from them directly, great customer service and a superior product.
Depending in which ones you choose, they may or may not be DOT "compliant" or "approved". These wheels are breed from and made for off road and racing applications.
I suppose if you choose some race wheels that are not DOT approved, plan to use them on public roads, and then went looking for trouble from the state officials; ....such as contacting them and saying something to the effect of "I'm using non-approved wheels, are you going to track me down and give me a ticket"? You'll prolly get what you ask for after drawing negative attention to yourself.
Just because some of the models are not approved doesn't mean they're junk or un-safe. It may mean the company that makes them choose not spending the 100's of thousands of dollars getting them tested and approved...maybe because the off road market is fairly small compared to the general passenger car market.
Like most wheels, these wheels are easy to balance. Balancing tires/wheels is all about the tires. Junk tires are hard to balance and have other ride issues, high quality tires are make life simple.
http://www.trbeadlocks.com/