Rim spec

[inlinesix]

12 minutes ago, Vince218 said:

-> Original PS4 ( 235/40R18 ) is 95Y, indicated on the tire show max 340 kpa..... means i can pump air to 340kpa without any risk?

on the chassis indicate recommend air pressure 220/230kpa.

-> Good Year Efficient Grip Performance ( 225/45R8 ） 95W, not sure the max kpa

-> Hankook Prime3 ( 225/45R18 ) 95W, not sure the max kpa

Follow manufacturer recommendation

230kpa

[Vince218]

9 hours ago, inlinesix said:

Follow manufacturer recommendation

230kpa

ok go it, thanks

but what if next time when i change to smaller size tire, how to calculate the suit air pressure?

Edited January 6, 2021 by Vince218

[Roberttan]

On 1/6/2021 at 8:24 PM, Vince218 said:

ok go it, thanks

but what if next time when i change to smaller size tire, how to calculate the suit air pressure?

NO NEED TO calculate

refer to car manufacturer recommendation.

owners manual or door pillar , fuel cap cover

dont follow tire sidewall 

[inlinesix]

48 minutes ago, Roberttan said:

NO NEED TO calculate

refer to car manufacturer recommendation.

owners manual or door pillar , fuel cap cover

dont follow tire sidewall 

If load index is different from factory spec, need to increase or decrease tyre pressure.

[Roberttan]

i only know we follow the same tire pressure as recommended 

example (cold pressure)

tire size           load index    pressure

225/45/17    94W              230 kpa (STANDARD LOAD)

                                             250 kpa (full load)

so you can inflate 230-250kpa depending on your own preference 

my understanding XL= extra load= for same tire same pressure = can carry heavier load (correct me if i am wrong)

so to me always use manufacturer as guide line,

i just pump 230kpa for comfort

250kpa for better  fuel consumption