Could be a couple of things.
I looked for some threads relating to tire pressure (before I started this thread to provide some info) and found these 2...
http://www.newtiburon.com/forums/sho...light=pressure
http://www.newtiburon.com/forums/sho...light=pressure
When you did the new tires, did you buy exact replacements (to OEM tires) or do a different tire?
If an exact replacement (size, brand & model), recheck your tire pressures against the owners manual or the label in the drivers door.
But, if you changed the tire, you may NOT want to use the original tire pressures.
Why?? What holds up a tire is partly the sidewall construction, the majority is the air.
For some tires, they have a max inflation of 44psi cold (molded in the tire sidewall), while others may have a 51psi max inflation.
So, say your OEM tires had a max of 44 and you went to a max of 51, you are likely running too soft a pressure which will mess with handling.
So, what to do.....I have a decent "rile of thumb" that works almost all the time. Big tires on a very light car (early Mazda Miata is an example) fall outside my "RoT".
The rule is, run 80-85% of max inflation, the front should be ~2 psi more than the rear.
On a tire that has a max of 51psi, run ~46psi front, 44psi rear. Changing the pressure can tune the ride, changing the front/rear bias can change the handling.
My wifes 04 Tib has ContiContact DWS and I run her pressures at 46psi front, 43psi rear. It corners well and the ride is not too stiff.
I do the same for all our cars (except the Jeep Cherokee......) and have no issues and the handling is sharp.
Another bit of info, your tire pressure changes by ~1psi/10*F change in temp. This could be why a car with TPMS has a light on in the morning, but it goes off after driving or later in the day. The extra heat can raise the pressure enough to fit above the lower limit (I do not believe ANY TPMS lights up with high pressure, only low pressure).
[A good example of pressures is my own Subaru. OEM tires were a Potenza RE-092 with a max of 44psi, current tire is a Pirelli P-Zero Nero M&S with a max of 51psi. Stock tire pressures are in the mid 30psi range, I currently run 46psi front 42psi rear to allow a bit of TTO.]
I looked for some threads relating to tire pressure (before I started this thread to provide some info) and found these 2...
http://www.newtiburon.com/forums/sho...light=pressure
http://www.newtiburon.com/forums/sho...light=pressure
When you did the new tires, did you buy exact replacements (to OEM tires) or do a different tire?
If an exact replacement (size, brand & model), recheck your tire pressures against the owners manual or the label in the drivers door.
But, if you changed the tire, you may NOT want to use the original tire pressures.
Why?? What holds up a tire is partly the sidewall construction, the majority is the air.
For some tires, they have a max inflation of 44psi cold (molded in the tire sidewall), while others may have a 51psi max inflation.
So, say your OEM tires had a max of 44 and you went to a max of 51, you are likely running too soft a pressure which will mess with handling.
So, what to do.....I have a decent "rile of thumb" that works almost all the time. Big tires on a very light car (early Mazda Miata is an example) fall outside my "RoT".
The rule is, run 80-85% of max inflation, the front should be ~2 psi more than the rear.
On a tire that has a max of 51psi, run ~46psi front, 44psi rear. Changing the pressure can tune the ride, changing the front/rear bias can change the handling.
My wifes 04 Tib has ContiContact DWS and I run her pressures at 46psi front, 43psi rear. It corners well and the ride is not too stiff.
I do the same for all our cars (except the Jeep Cherokee......) and have no issues and the handling is sharp.
Another bit of info, your tire pressure changes by ~1psi/10*F change in temp. This could be why a car with TPMS has a light on in the morning, but it goes off after driving or later in the day. The extra heat can raise the pressure enough to fit above the lower limit (I do not believe ANY TPMS lights up with high pressure, only low pressure).
[A good example of pressures is my own Subaru. OEM tires were a Potenza RE-092 with a max of 44psi, current tire is a Pirelli P-Zero Nero M&S with a max of 51psi. Stock tire pressures are in the mid 30psi range, I currently run 46psi front 42psi rear to allow a bit of TTO.]
