I current am running 35” Nitto’s that have a f load rating.....unfortunately I put them on 20” wheels. I am looking to go back to 17” wheels and run 37” Milestar M/T because the ride is way to stiff. I see that 37x12.50x17 only has a d load rating. Has anybody done this switch and do you feel the ride is not as stiff? I have to air down to go down a gravel road with the F rated Nitto’s. You can get a 13.50 in a c load tire but that is a lot of tire on the pavement for a daily driver. Thoughts?