The ride seems a bit hard. Could it be because of the nitrogen used to inflate them?

These tires are delivering superior mileage, with heavy loads. in all weather conditions

Best tires I have ever had!

I like the long treadwear and smooth ride, especially in the rain and snow.

Very good wear and problem free driving for 46,000 miles.

Love how the tires makes my ride so much smoother and safer

Very good comfort ride and control.

best tire of this type i ever had

this has been the best tires that I have had on my Subruban.

An excellent tire that stays in balance and wears very well.