what the preasure should be when u upgrade your RIMS

[swat]

i change my Rims from 15 to 18

can whoever use 18 give me a idea how many PSI and KPG your guys used ?

BTW my trip computer start telling me my JAZZ VTIS using about 9.8L/100 form the 7.3

what's your different after changed ???


thanks for help

[Philip Lee]

i'd say the roll diameter. man 15 to 18 is quite a big jump. and if the total diameter has changed the readings and speedo etc will be incorrect.

[|N|]

BTW my trip computer start telling me my JAZZ VTIS using about 9.8L/100 form the 7.3

what's your different after changed ???


thanks for help

its quite usual.. coz 18 is much heavier then ur 15... so yea... ur car will drink a lot more....

[Zdster]

If I am not mistaken pressure will also depend on the width of the wheels as well.

[Andys]

More than anything the best tyre pressure is dependant on the rubber compound and type of tyre used. I dunno about your tyres but all the ones I've had say their maximum PSI rating on the sidewall of the tyre as well as their maximum rated load.

- Andrew

[swat]

It's 215/35/18 ...........

[hinezz]

hey man, i have 18's as well.. i put in abt 38 psi.. should be alrite

[spoon fit]

woo....any pic?
i m think 18"

hinezz, which state r u from?

[hinezz]

hey im from queensland.. jst wondering hw do i attach a pic 2 dis thread? im confused :confused:

[spoon fit]

http://imageshack.us/index.php

[hinezz]

http://img217.imageshack.us/img217/5758/image0026ak.th.jpg (http://img217.imageshack.us/my.php?image=image0026ak.jpg)
http://img365.imageshack.us/img365/2516/image0036xv.th.jpg (http://img365.imageshack.us/my.php?image=image0036xv.jpg)

[swat]

i'm in sydney.............the pics.......i will find a time to take some ......

[EK9]

it really depends on your type of tyre... it's best to check the tyre manufacturer's specs as each tyre will vary accordingly.

[toE]

More than anything the best tyre pressure is dependant on the rubber compound and type of tyre used. I dunno about your tyres but all the ones I've had say their maximum PSI rating on the sidewall of the tyre as well as their maximum rated load.

- Andrew

Exactly what I thought too.
What tyres are you using? Check the sidewalls. I'm sure the maximum pressure is stated on it, then you can go by it.

[swat]

i know it very well but most time we dont put maximum pressure ........right ?

[toE]

No..of course not.
But it should give you an indication of what pressure you can max it up to. :)

[XESX]

for normal driving = 35psi
Cruise to mountain = 30psi

i have more grip with 30psi...yes i can feel the Difference.

[swat]

i will try it haha but will 30psi hurt my wheels ? i mean the 185/55/15 is already request 32psi...........

[asiansquad]

what about for 205/45/16??

[XESX]

i will try it haha but will 30psi hurt my wheels ? i mean the 185/55/15 is already request 32psi...........
don't think it will hurt the wheels....i had drive a car with 10psi with all tyres ...there was like no problem at all....but i am sure it is not too good for the tyres.....

[asiansquad]

lol 10psi..that is definately no good