I have more questions for you guys! In the past I've always inflated my tires to 32 pounds despite the 35 "max" pressure listed on the tire. Now with the Caddy, the owner's manual recommends 30. On the tire it says 35! 30 seems awfully low to me, and my questions are: If I don't put the tires to 30, will the CCR still work properly? What do you put your tires at for pressure? I think putting them to higher pressure will give less rolling resistance, and therefore more mileage, but a rougher ride. Is there a risk of blowout at 30? Also, a tire guy told me that with a heavy car, you need tires with a stiff "sidewall" is there logic to that statement?::banghead2 :confused:

Well on mine, I have the tire pressure monitor, and i've been anywhere from 30-35psi, depending on the weather. And i have had no problems, even at highspeeds with 30psi. SO i wouldnt worry about it, unless its below 30
Frank

The pressure printed on the tire sidewall is the manufacturers recommended MAXIMUM pressure for that tire. It is by no means the pressure that you should inflate the tires to for normal use. The OEM of the car gives a recommendation for tire pressure. It is usually located on one of the door jambs, the glove box lid, or the owner's manual. This pressure takes into account the weight of the vehicle plus occupants and is specific for the stated tire size. If you change the tires on your car, you're left to your own as for figuring out what to inflate them to. Then it's up to you to play with different inflations until you decide what's right.

heres is how i see it.

My car recomends 30 PSI, my tires say 50 PSI max. I like ot have a stiffer tire I put 40 lbs in.

but... sometimes the mfg recomendation could be dangerous. For example. When the exporer first came out people compalined the ride was too harsh. So ford fixed it. they recomended a lower tire pressure. needless to say some people let it get too low cus they dont check it in the winter, then you have blowouts, rollovers and law suits all cus you recomend a low tire pressure.

When i fill up my tires i usually go by what is on the tire rather than what the car recomends. Then i will usually take 5-10 lbs off the tire if i feel it is too high.

It bassicly comes down to how soft of a ride do you want and how quickly do you want to go through tires?

I head on tv on saturday that a recent study shows that almost 75% of all car on the road have DANGEROUSLY low tire pressure. there is some food for thought.

Yeah, you'll just have to find out for yourself what ride/handling you like. The CCR will work regardless. A stiffer sidewall will usually give you better response, but the ride will be harsher.

My Nissan truck recommends 26 psi on the door jambs (probably from complaints of a harsh ride), but the Michelin tires I have on there have a max of 44 psi. I like about 35 psi in them. My Cadillac recommends 30 psi I think. And the Michelin tires are also maxxed at 44 psi. I usually run about 32 or 33 pounds in the Cadillac's tires.

It all depends on your preferences and tire style.

38 to 42 front 34 to 38 rear. Just what I run after reading on another forum from a Cad. engnieer type guy. Just dont go under the recomended pressure & you'll be ok.

OK. 26! I would never do that even if the door jamb said to!

"a Cadillac engineer type guy"?
WHAT?
38-42psi is a LITTLE extreme I think but hey it's your car and your tires.
As long as you manage decent tire wear and ride quality, have at it.

He is "bobinsky" or something like that over on Bruce Nunleys site. Works for GM on Cads. The pressures were for a Seville. I have been running them for 4 mos. (5K mi.) and havent noticed much difference in the ride and no adverse tire wear so far.

BBOBYINSKY....One of the most knowlegeable guys I know! If he says it good.....It is!

I inflated the Toyos on my 93 Deville to 41-44PSI. Tire tread is warranted to 65,000 miles, but I got 110,000 miles out of them. Nice quiet tire with good traction in all weather. S- and T-rated. I also rotated and balanced them every 10k to 15k miles.

I liked these tires so much that I got another set (the fourth set on this car). Car now has 298k miles on it.

The best guideline for tire pressure is the manufacturer's recommendation found on the sticker attached to the door (or trunk lid on some vehicles). You can go a couple of pounds higher however it generally should not be more than 5 pounds. The only exception is when the car is loaded to maximum rated load and that is when the maximum pressure listed on the tire sidewall should be used. Excessively high tire pressure can actually hamper handling by reducing the contact patch on the roadway and over working the struts/suspension on roadways that are less than smooth. Additionally, it can result in excessive and premature suspension wear.

Does anyone else seem to have issues maintaining tire pressure? It seems like I am having to inflate my tires almost every month (I did not have this issue on past cars). I had all my tires checks and the mechanic told me there are no leaks. I wasn't sure if this was just a randon issue or if other 'Lac owners have experienced the same thing.

The mechanic probably just put soapy water on it. A lot of times the leak is too slow to make bubbles in the soap. The only 100% effective way of finding leaks in the tire is to submerge the tire in a tub of water. Before I learned that trick It would take hours to find slow leaks, or I wouldn't find it at all.

Dumb question probably but what is CCR? (besides the band) :hmm:

Dumb question probably but what is CCR? (besides the band) :hmm:

I'm not sure but I think it stands for Computer Controlled Ride, or somthing like that.

I'm not sure but I think it stands for Computer Controlled Ride, or somthing like that.

Yep, you got it. (that or computer command ride, never remembered the exact term)

Later models had a similar system, SSS. Stood for two things, speed sensitive suspension, and speed sensitive steering.

The pressure printed on the tire sidewall is the manufacturers recommended MAXIMUM pressure for that tire. It is by no means the pressure that you should inflate the tires to for normal use. The OEM of the car gives a recommendation for tire pressure. It is usually located on one of the door jambs, the glove box lid, or the owner's manual. This pressure takes into account the weight of the vehicle plus occupants and is specific for the stated tire size. If you change the tires on your car, you're left to your own as for figuring out what to inflate them to. Then it's up to you to play with different inflations until you decide what's right.

:yeah:
That is almost exactly what I would have said.