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Forum nameHandling/Suspension
Topic subject225 40 18 air pressure
Topic URLhttp://forums.2gnt.com/dcboard.php?az=show_topic&forum=6&topic_id=19926
19926, 225 40 18 air pressure
Posted by jamesman, Dec-31-69 06:00 PM
i was just wondering, people with this size tire, what tire pressure are you running?

lates
james
19927, RE: 225 40 18 air pressure
Posted by MotoFool, Dec-31-69 06:00 PM
32-40psi is a decent range to stay in

Bill
19929, RE: 225 40 18 air pressure
Posted by BigBald, Dec-31-69 06:00 PM
I run 40psi......
19935, RE: 225 40 18 air pressure
Posted by bono316, Dec-31-69 06:00 PM
40-42 psi.

19945, RE: 225 40 18 air pressure
Posted by 2gsims, Dec-31-69 06:00 PM
I usually got 40psi.
19947, RE: 225 40 18 air pressure
Posted by Clay, Dec-31-69 06:00 PM
Whoa, i guess my 36 is somewhat low.
19950, RE: 225 40 18 air pressure
Posted by MotoFool, Dec-31-69 06:00 PM
alot depends on the max of the tire..

what your suspension and roads are like more pressure for bad roads to keep from bending wheels less presure on smooth roads.. too much pressure can make your tires bloat and be unstable and explode...

i wouldn't wanna see anything above 45psi ever...
(ona under 50seris tire)
Bill
20002, RE: 225 40 18 air pressure
Posted by SonicYan, Dec-31-69 06:00 PM
44 psi max. That's what it says on the sidewall of my Kumhos.
20006, RE: 225 40 18 air pressure
Posted by turbo8u, Dec-31-69 06:00 PM
also depends on elevation
_________
96 talon esi-t
san clemente, ca

Uberingram> I bow down to the Geo
20007, RE: 225 40 18 air pressure
Posted by Eagle 5, Dec-31-69 06:00 PM
I go by what the door says plus like 1-2 psi. so 33-34 psi in teh front and 30-31 psi in teh back. No problems with anything, but I also have 235/40/18 tires so I have a little more room in there
20030, RE: 225 40 18 air pressure
Posted by Ryan_Hes, Dec-31-69 06:00 PM
I run 32psi in the front and 36psi in the rear. Also, I dont think it matters how large the tire is, or how much 'room' you have - 35psi will be 35psi wether its in a car tire or a minivan tire. The only reason higher psi would be necessary in larger vehicles is purely because of the weight... I assume that a 225/40 tire with 35psi is equally as inflated as a 235/40 or a 205/55 -- after all, it's not the amount of air in the tire, its the pressure of the air in the tire...
20031, RE: 225 40 18 air pressure
Posted by Mannyyy, Dec-31-69 06:00 PM
I'm running the tire pressure that's stamped on the door. :wary

32 psi front, 29 psi rear... I didn't know you're supposed increase the pressure??
20043, RE: 225 40 18 air pressure
Posted by bono316, Dec-31-69 06:00 PM
Ryan - what you're saying makes sense. I work with bicycles everyday, and I was trying to apply your view to bicycle tires. I put 45lbs of air into a mountain bike tire (wide tread, tall sidewall), and the tire is pretty frickin hard. Then I put the same 45 lbs of air into a road bike tire (narrow tread, thin sidewall), and that tire is almost flat. Mountain bikes usually take between 35-45 lbs of pressure, whereas a road bike takes between 95-120 lbs. I know that comparing bikes to cars is like apples and oranges, but it would be interesting to know if maybe there is anything in common between the two comparisons. Comments, anyone??

20050, RE: 225 40 18 air pressure
Posted by MotoFool, Dec-31-69 06:00 PM
u want more air pressure ina thinner side wall to keep from hurting your wheels and more air pressure provides a stiffer tire for corners, as long as u dont bloat the tire and make a flat tire round...

Bill
20078, RE: 225 40 18 air pressure
Posted by Amish_Eclipse, Dec-31-69 06:00 PM
there's alot of things to factor into tire pressure. there's a book that has all the information printed out for you. most good shops will have one. tirerack might even sell it. i forget what it's called but the sales people always check it when one of us gets confused.

for this size i'd say no less then 35. the only exception to the rule that i can think of is yokohama parada's. they say 35psi max. unless the tire says otherwise you shoul dreally run between 35-42.
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