I recently had BFgs 45 series for like 5 years. Then I swapped them out with FAT fives with a 205-50- size NEW kumho ASTs. PSI set on 32 front and 30 rear.

I like checking my tire pressure every other month. Is it normal for these tires to lose tire pressure every month?

So the fronts were at 32 in August 1st. Today it went down to 30?. Is this normal for this type of tire?

My recent BFgs hardly loss PSI in three months.

 

I have AST's and they do loose a little pressure but so do the tires on all my other vehicles. I never thought much of it though.

 

All tires tend to lose a couple psi every month or so and depending on the temperature your pressure will also fluctuate.