I just changed over to my Nokian Hakkapeliitta W106 winter tires and I am dogging while ridding into the office. The max recommended pressure on these puppies is 65 psi. At that pressure and with the knobs and studs my 1:20 21-mile ride now takes me 1:45. Last year I think I progressively increased tire pressure until I was running at 80-85 psi. The tires are mounted on almost new Mavic A719 rims. My question for the group is, what risks am I taking by exceeding the mfr's max pressure? Loss of bead? Sidewall blowout? Reduction of stud contact?
Thanks in advance,