I want to order one of these Bighorn rear tires for my T-dub. I live in Washington State and I will want to make the bike street legal this spring. Do I need D.O.T. approved tires for the bike to be street legal? I do not have a motorcycle endorsement yet so I will have to take the test. I am curious if anybody here in Wa state would know if I will run into any problems getting the bike licensed with that rear tire. Thanks,