YACT: whats the appropriate tire pressure?

[z0mb13]

yes I did look at the tires, and it only says maximum pressure of 51 psi..

My tires are currently at 25 psi, is this too low?

 

[TechnoKid]

Generally, 32psi is a good setting.

 

[minendo]

Look at the pressures listed on the driver's side door jam.

 

[Heisenberg]

Originally posted by: minendo
Look at the pressures listed on the driver's side door jam.

Or sometimes it's in the glove box if it's not in the jam.

 

[Insane3D]

Originally posted by: TechnoKid
Generally, 32psi is a good setting.

 

What they said, and it should also be in your owners manual.

rtfm!

 

[Ronstang]

Originally posted by: Heisenberg

Originally posted by: minendo
Look at the pressures listed on the driver's side door jam.

Or sometimes it's in the glove box if it's not in the jam.

These pressres only apply to the original equipment tires. I would suggest running your tires at their maximum listed pressure on the sidewall as this will yield the least rolling resistance and the best gas mileage.

 

[TechnoKid]

Originally posted by: Ronstang

Originally posted by: Heisenberg

Originally posted by: minendo
Look at the pressures listed on the driver's side door jam.

Or sometimes it's in the glove box if it's not in the jam.

These pressres only apply to the original equipment tires. I would suggest running your tires at their maximum listed pressure on the sidewall as this will yield the least rolling resistance and the best gas mileage.

running them at that pressure, which is sometimes listed at a 44 to 51 psi max will wear out the middle of the tire fast. as far as the door jamb thing or the car manu spec, i believe it applies to all tires of the same size and load rating. If you buy bigger rims then you need to adjust tire pressure accordingly.

 

[Redviffer]

Originally posted by: z0mb13
yes I did look at the tires, and it only says maximum pressure of 51 psi..

My tires are currently at 25 psi, is this too low?

I usually run my tires at what is on the sidewall, as they are not the OEM tires anymore. 25 psi is pretty low IMHO.

 

[Insane3D]

Originally posted by: TechnoKid

Originally posted by: Ronstang

Originally posted by: Heisenberg

Originally posted by: minendo
Look at the pressures listed on the driver's side door jam.

Or sometimes it's in the glove box if it's not in the jam.

These pressres only apply to the original equipment tires. I would suggest running your tires at their maximum listed pressure on the sidewall as this will yield the least rolling resistance and the best gas mileage.

running them at that pressure, which is sometimes listed at a 44 to 51 psi max will wear out the middle of the tire fast. as far as the door jamb thing or the car manu spec, i believe it applies to all tires of the same size and load rating. If you buy bigger rims then you need to adjust tire pressure accordingly.

Also, if you fill them to max PSI when they are cold, the pressure will increase beyond the max once they heat up.

 

[z0mb13]

hmm the manual says to check the tire..

the tire only gives maximum pressure of 51 psi

and it is a low profile Z rated tires.

and I measured it when the tire is hot (after some driving)

 

[TechnoKid]

what size tire and what car is it for? Genreally for a low profile tire, like say a 225/45/17, i'd go with 34-38psi when cold.

Don't check your tires when hot as this will give irradic readings, unless you fill your tires with nitrogen instead of air.

 

[Insane3D]

You should ideally take tire readings when the tires are cold. I have run low profile Z-Rated tires on my Mustang, and all the places I've been to suggested 32 - 35 PSI.



Edit:

I ran 225/50/ZR16 up until now, a bit off from OEM size (225/55/ZR16), and I have always run 32-35. I just picked up a set of 17" x 9" rims and four 245/45/ZR17's (Dunlop SP8000) and I'll likely run the same.

~10" of contact patch on each corner....yummy.

 

[z0mb13]

Originally posted by: TechnoKid
what size tire and what car is it for? Genreally for a low profile tire, like say a 225/45/17, i'd go with 34-38psi when cold.

Don't check your tires when hot as this will give irradic readings, unless you fill your tires with nitrogen instead of air.

they are 255 (or 245??) in the back, and 235 I think in the front. and 18 inch

I think I will add more pressure tomorrow... will make it to 35 ish

and its for 330ci

 

[Insane3D]

Man...18 inchers must cost a pretty penny....yikes!

 

[z0mb13]

Originally posted by: Insane3D
Man...18 inchers must cost a pretty penny....yikes!

actually it was a $700 option when I got the car... sooo I went for it

 

[TechnoKid]

The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

 

[Insane3D]

Ahhh....wait till you have to buy replacements...heh.


On a side note....are Z rateds really needed for a 330ci?

My boss here at work has a newer 5 series V8, and he has the 18" rims option. If those are the rims you have....NICE.

 

[z0mb13]

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

mine is the bridgestone potenza RE040, yea I am dreading the day that I will have to replace the tires..

no regular 330ci come with 17inch, the 18inch is an option

 

[Insane3D]

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

Close.... $230 for the rear...$186 for the fronts....for the S-03.


For the RE040, $234ea for the rears....$194ea for the fronts..

 

[z0mb13]

Originally posted by: Insane3D

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

Close.... $230 for the rear...$186 for the fronts.

I will not get the S03, my current ones are good enough (I hope mine will be cheaper than S03)

 

[Insane3D]

Originally posted by: z0mb13

Originally posted by: Insane3D

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

Close.... $230 for the rear...$186 for the fronts.

I will not get the S03, my current ones are good enough (I hope mine will be cheaper than S03)

Nope...about the same...

 

[z0mb13]

Originally posted by: Insane3D

Originally posted by: z0mb13

Originally posted by: Insane3D

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

Close.... $230 for the rear...$186 for the fronts.

I will not get the S03, my current ones are good enough (I hope mine will be cheaper than S03)

Nope...about the same...

NAWWWSSSSS ... maybe time to skimp to japanese tires lol

 

[bolido2000]

Originally posted by: z0mb13

Originally posted by: Insane3D

Originally posted by: z0mb13

Originally posted by: Insane3D

Originally posted by: TechnoKid
The tires for the bmw 330Ci 18" wheels are like $210 each for the rear (255/35/18) and about $200 each for the front (225/40/18) if you decide to get Potenza S-03.

Close.... $230 for the rear...$186 for the fronts.

I will not get the S03, my current ones are good enough (I hope mine will be cheaper than S03)

Nope...about the same...

NAWWWSSSSS ... maybe time to skimp to japanese tires lol

what are you talking about?? Bridgestone is japanese.
Kumho are one of the cheapes 18'' tires you can get.

 

[Insane3D]

Yeah, I'm not sure, but I don't think high performance Z-rated tires are really needed for that car...do you drive very aggressively or drive over 100 or so consistently ?

Edit:

OT, but I hate when car manufacturers use different front and rear sizes....it makes rotation impossible...especially with high performance tires which are usually directional.