I realize it says off road use only BUT then again why does it say this.
Installation Tips
For off road use only. The following must be considered when using Aero wheels for on highway/street use when the wheel/tire assembly is being balanced. Aero wheels are lug centric, which means they are built off of, and must be balanced using, the bolt circle and NOT the wheel center hole. Improper use of a tire balancer that centers the wheel on the hub bore, not the bolt circle, will result in an incorrect reading for rim runout as the center hole is not in the perfect center of the bolt pattern. The only machine capable of performing a lug centric balance is the Hunter GSP 9700 with the flange plate bolt circle adapter and no centering cone.
So apparently if they would even mention this then apparently there safer than you think. That justified it enough for me. If there would be a major issue then that would have been left out entirely. I dont think they would even risk it by saying that if their wheels werent capable being on the street