welcome to CL - nice LS

 

I usually put 40psi myself, I don't know why I said 40-45psi...

 

I am suprised by the tire pressue being reported in this thread. I have an 06 LS Ultra with Michelin MXV4+ tires mounted on the factory rims. I find anything over 33 pounds of pressure delivers a harsh ride. If I had wanted to feel the road I would have bought a BMW 7 Series.

 

I'm also surprised. My LS400 with 16" wheels calls for 29 psi. My LS430 CL with 17" wheels calls for 32 psi. I never put higher than recommended as it gives a harsher ride.

More pressure or lower profile tires gives better handling but a harsher ride.

The only tire wear problem that I ever had was when someone put 35 psi in my LS400 and it started balding in the middle before i noticed the high air pressure. I lowered the pressure slightly below the recommended 29 and kept on going.

 

Just playing around with the pressure right now. Like I said, it just seems really low at 33. It almost seemed slightly flat.

 

Some tires just have a softer sidewall, so they may seem "flat" when in fact the pressure is fine. The perfect pressure is when the thread on the tire gets full coverage, without the sidewalls starting to flop and contact the road. The look the sidewall could look bulgy at this point and look flat.

 

Just wondering does best tire pressure vary with size, i.e. 16", 17", 18", 19', 20"?

 

nice LS any interior pics?