May I add something here;
It's another marketing scheme to separate you and your hard-earned money. I
go through this all the time with my wife.
I use a locally-owned shop for all my tire needs. He refuses to install an
N2 system, citing it's a waste of customer's money (and his).
He does offer the brand name/higher priced tires but rarely suggests them.
His dad opened the shop 30 years ago and I have yet to
return anything that he's sold me.
Higher pressure? My brother increases his TP to 50 lbs when he drives
cross-country and claims he get 2-3 MPG better, but I know he's got to wear
a kidney belt.
Never mind the increased wear and tear on the suspension components.
My Sonata has 225/50R17 and I keep them at 40.
My point here is that this is reminiscent of a scam by a station near my
grandma's house (senior community) where the local garage/gas staion got
busted for charging seniors to replace the air in the tires, "old air loses
its ability to properly support the vehicle and causes decreased mileage".
My local Hyundai dealer doesn't even try to sell me this garbage. He knows
I'm an ex-mechanic and that I wouldn't buy into such a thing.
Beware of the
"Club" tires and services.