Are you people not understanding that even with Maxxis tires you have a 65 MPH max speed rating when loaded to the max load rating and max PSI inflation as stated on the tire's sidewalls? You are NOT to exceed either the tire's max load rating nor the tire's max inflation rating combination. Want to go over 65 MPH? Lessen the load on the tire and/or have more PSI inflation left that's unused. Do NOT exceed either rating specification! Simple as that and even Maxxis states it in writing as does some other tire manufacturers of ST trailer tires. There's nothing magic about Maxxis tires as they have the same governing criteria as other tire manufacturers they must adhere to.