Tire pressure

[daytonaed]

Can someone please tell me what the air preasure should be on the stock tires?

My boss has an 07 or 08 with the tire preasure sensing option and is getting a low tire preasure warning.

Thanks in advance for any help in getting this information.

Ed C.

[daytonaed]

Never mind I found out the fronts are 51PSI max, rears 50PSI max.

Can someone please tell me what the air preasure should be on the stock tires?

My boss has an 07 or 08 with the tire preasure sensing option and is getting a low tire preasure warning.

Thanks in advance for any help in getting this information.

Ed C.

[Chuck Jones]

I never heard of folks running their tires in the 50's......mostly 44 rear and 36 front. Maybe the newer cars are running higher pressures.....but those pressures make for a bumpy ride.

[Loren]

I agree with Chuck - those sound like Max pressures.

[wvicary]

Did you get those pressures from the tire sidewall info? Thats the max pressure that the tire is rated for not the recommended pressure for the vehicle. The info should be in the owners manual,sometimes on a decal located on the fuel filler door or drivers door jam. Refer to the owners manual for adjusting pressure with TPMS as it often has to calibrated with the type/size of tire and then a learning period.

[wross996TT]

my recommended pressures are on the fuel filler door. 50+ is way too high cold.

[Cyotee01]

50 psi would help keep that big fat contact patch flat across the wide tires, but won't give you optimum grip if it can't mold to any noticeable road imperfections/lumps & bumps.

Remember that tires also perform a roles as suspension. So you could possibly run 50 psi on a hot day at a smooth race track, but you'd end up with less overall grip if on normal roads - not to mention the general lack of comfort.

My 2c worth anyway.

[Terminator]

Your boss will kill himself. Lower that pressure.

[docdavid]

I have a 2006 Carrera with 18 inch wheels. I run at 39 in back and 33 in front. I found 44R and 36F too rough riding.How come 39R and 33F OK per manuel for 19 inch wheels but not recomended for 18 inch wheels? !8 inch wheel setup has higher sidewall height. Any ideas?

[jpflip]

Exactly like Chuck recommendation, I am using 36 in front and 44 in the back with 2 passengers total 325 pounds. Wear is exactly the same on all tires inside out...

[986fan]

On my 18's I run 30 F and 36 R. On my 19's I use 33 F and 40 R.

The pressures molded into the tire sidewall have nothing to do with operating pressures.

Those are the maximum safe pressures FOR MOUNTING PURPOSES ONLY!

Also.....don't buy old tires. They age even if they are new and unmounted on the garage

shelf. Look at the last 4 characters of the D.O.T. number. This is the month and year of

manufacturer.

[Loren]

On my 18's I run 30 F and 36 R. On my 19's I use 33 F and 40 R.

The pressures molded into the tire sidewall have nothing to do with operating pressures.

Those are the maximum safe pressures FOR MOUNTING PURPOSES ONLY!

Also.....don't buy old tires. They age even if they are new and unmounted on the garage

shelf. Look at the last 4 characters of the D.O.T. number. This is the month and year of

manufacturer.

Good advice

Just a small correction on tire dates.

The "last 4 digits" of date are tire manufacture date. The first 2 digits are "PRODUCTION WEEK" and the last 2 digits are the "YEAR".

So, 5000 means 50th week of year 2000, which means December 2000.

[986fan]

Just a small correction on tire dates.The "last 4 digits" of date are tire manufacture date.

The first 2 digits are "PRODUCTION WEEK" and the last 2 digits are the "YEAR".

So, 5000 means 50th week of year 2000, which means December 2000.

You're right!.........Thanks..........

[Chuck Jones]

Loren: One of these days, you're going to be wrong. :D

[wross996TT]

Loren: One of these days, you're going to be wrong. :D

LOL...one of these days..Chuck, you are going to be right.

[Chuck Jones]

I'd rather classify it as "room for improvement".