It may not be ticketable, but there's enough risk to me so its just not worth it. Have a tire blow out and cause an accident- wonder what insurance would do if they found out I wasn't running DOT approved wheels and/or the wheel manufacturer specs 25 PSI max. Not to mention the XK drives my family (2 very young kids) for all our long trips/vacations. Whether they're "safe" for long term street use is debatable.... it could be the manufacturer just doesn't want to go through the trouble to get the proper DOT approvals, or it could be they're actually not safe for long term high speed street use. Regardless, just another risk not worth taking due to the liabilities involved IMO; they're just wheels.