edinburger

hi guys as above

whats recommended air pressure for 225/40/R18 tyres ? i am running 34 all round is that ok ?

thanks


GS300

geeznuts

iTrader: (14)

all depends on the tire most shops say 32-36 I say screw them and follow what the tire recomends its on the tire it says MAX PSI most call for 50psi so 45-50psi

5t341th

iTrader: (16)

^^ do not pump max tire press of the tire. that is stupid.
32psi is good for most cars. look at the drivers door jam and it will call for 30psi stock.
is the tire stretched? if it is, run like 10psi more than normal.
but 32 provides comfort and enough air pressure to get good mileage.

edinburger

its not stretched and im now running 34 all round.

thats shoulkd be finr i think ?

thanks

English66

I would run 40 psi. 34 psi is for stock tires

vwynn

iTrader: (4)

NEVER inflate at load max..

are your tires overloaded? if so run around 40-41 psi (if you want). if not 35-37 should be "safe" (if you want)

SorrGwa

iTrader: (1)

when i worked at the tire shop, we usually set it to 36, unless specified.

for most suv/trucks, the tire pressure is a tad lower around 30-32 from what i remember, but passenger cars, 34-36 is good.

GS300-2002

FYI if you inflate at max psi and it gets warmer due to weather/driving for one thing the ride quality will be worse but also u can damage the tire. 30-36 is fine, for best mpg do 36, best ride/handling do 30, im at about 33