ScionLife.com

neneago · 05-10-2005, 02:06 PM

I know your not suppose to go by the tire pressure on the tire. Your suppose to use the one in the book. Which is 29psi...I think. Does that pressure stay the same after upgrading to bigger rims and different tires??? I did a search but didn't find any info.

RogerTTR · 05-10-2005, 03:59 PM

Not always! If you supply the complete make, model, and year of your vehicle, and your new tire size, I can check the correct pressure for you.

Jahanmn · 05-10-2005, 04:33 PM

Roger

Hey thanks - will you let me know also - I have done some digging but can't find out for sure. Also where are you finding the info.....

Sion xB '05
Motegi FF7 WITH 205-40-17 NITTO NEO GEN

Thx
Jahan

Dewmerz · 05-10-2005, 05:58 PM

moved

neneago · 05-10-2005, 07:57 PM

2004 xB with 17" rims I think the tire size is 35 or 40.

wooky1976 · 06-06-2005, 09:06 PM

RogerTTR, I have a 2004 xB with a 205x50x15 Kumho what psi should I use for front and rear, something higher for the front for more oversteer

neneago · 06-07-2005, 01:59 AM

Quote:

Originally Posted by wooky1976

RogerTTR, I have a 2004 xB with a 205x50x15 Kumho what psi should I use for front and rear, something higher for the front for more oversteer

I dont think RogerTTR is going to give us any info. I've been waiting since May 10th.

Kremtok · 06-07-2005, 03:57 AM

I called him up at Tire Rack, and he told me all I needed to know. You should try calling him; he's great to work with.

J_R_Ceja · 06-09-2005, 01:34 AM

neneago, what did you find out on the tire pressure info you were asking about? I bought some Enkeis for my BSP xb and I checked the cold tire pressure and it was 44psi. I also checked the cold tire pressure on my stock RS2 xb and it was also 44psi. I feel that's about 10 to 12 psi than it should be. Any help?

neneago · 06-09-2005, 04:27 AM

Quote:

Originally Posted by J.R.Ceja

neneago, what did you find out on the tire pressure info you were asking about? I bought some Enkeis for my BSP xb and I checked the cold tire pressure and it was 44psi. I also checked the cold tire pressure on my stock RS2 xb and it was also 44psi. I feel that's about 10 to 12 psi than it should be. Any help?

That seems kind of high. I have 17" rims right now and my pressure is set at 29 psi. I dont know if its correct. I have to call up tire rack.

Kremtok · 06-09-2005, 04:47 AM

For my particular tires, on my 17" set up, Tire Rack told me to run at 34psi. Of course, this number is different depending on the tire, whether it's an xA or an xB, and a few other things, as far as I understand. Call them up and they'll tell you about it. I just wanted to let ya'll know where my tires are set so you can use it as a reference point.

J_R_Ceja · 06-09-2005, 11:50 AM

neneago, I thought that it 44psi seemed kind of high myself. I'm using stock tires on my wheels and the side wall does call for 44psi. I guess I will run them at 34 front and 32 rear and see if it changes the ride. I just don't want to wear out the tire unevenly.
Thanks for the info Kremtok, that was the bases of my using 34psi on the front.

SciFly · 06-13-2005, 10:48 PM

Tire pressure needs only to be matched to the -load- on that tire, taking into account, also, how fast the tire will be run

Tirerack.com has FAQ's giving much information about tire pressure.

People want to be 'told' how much air pressure to carry. The manufacturers set guidlines for inflation pressure to keep the tires and people safe.

The very basics for and of tire pressure don't seem to be discussed much here.

Questions (I know the answers and so should you):

-what is the purpose of a pneumatic tire?
-what does the inflated tire do that no other method can ever quite equal
-how can the load capacity of the tire be altered?
-say the tire is loaded only very lightly- to a fraction of it's rated capacity: how much air pressure would the tire "need"?

-If the tire must be temporarily overloaded (carrying cinderblock?) what can you do to make this trip safe(r)? Two things, really.

---
If you know what you are doing and why you are doing it then rules can be customized to your needs, instead of to match a computed number.

RogerTTR · 06-14-2005, 10:39 PM

Jahanmn, for your application ( 205-40-17 ) you need to be running 35 PSI if the tire is a P-Metric tire size, and 36 PSI if your tire is a Euro Metric tire size in order for the tire to achieve the proper load carrying capacity for your vehicle.

RogerTTR · 06-14-2005, 10:48 PM

wooky1976 , for your application ( 205-50R15 ) you need to be running 29 PSI front and rear to achieve the proper load carrying capacity for your vehicle. Regarding information on adjustments for Performance Handling, I will be posting a guide shortly!

Streeter · 06-14-2005, 11:26 PM

Is it a bad idea to go by the recommended tire pressure on the door plate?

SciFly · 06-15-2005, 12:20 AM

Quote:

Originally Posted by RogerTTR

wooky1976 , for your application ( 205-50R15 ) you need to be running 29 PSI front and rear to achieve the proper load carrying capacity for your vehicle. Regarding information on adjustments for Performance Handling, I will be posting a guide shortly!

Oh, great! Thanks, Roger--- this'll be a permanent help

let us know when it's ready to be seen.

IF I commit error of mis-information in general tire talk please, always, correct me either here or by PM as you like

with appreciation,

reid