Bigger steer tire

[sbtrucking]

We haul doubles for fedex and they run all their trailers and dollies at 85 psi, also because of doubles my fifth wheel is back so I am ligh on steers, how ever we roll fast my trucks are governed at 70-72 mph, we run team drivers, wild not dedicated runs so when we make it to the yard we get on the list for the next run.
Some of the bigger contractors they have their trucks at 75 mph so they make it sooner on the list and get up to 6-7k miles a week, soon as they get couple hundred k miles on their trucks they trade them in.
You are right speed beats the trucks, I have 11 mns old volvo 780 governed at 72mph and front end is already loose and shaky it has little over 200k miles.
Thats y I am hopping bigger softer tire can help.