imported post
I got my car tires at Costco, and as mentioned above they use it standard.
But I didn't like it. My tires seemed too mushy.
Nitrogen doesn't expand like regular air when it heats up. Your tire pressure is set while the tire is cold, but the tire is designed to run hot. So while they tell you to put 32 psi in the tire, the engineers know that the tire will be running at 45-50 psi, so they count on the expansion.
When you switch to nitrogen, you lose that expansion, so the tires that are cold filled to 32 psi will be too soft.
Unfortunately I don't know what pressure to use when using nitrogen, in order to intellegently compensate. So it's easier to just use regular air.
But since my car tires felt so mushy, I wouldn't think of using it in my motorcycle tires.