can anyone help tyre pressure

11 replies
Found 6th Dec 2009
i have 225/45zr 17's
searched the net no joy
please help me

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11 Comments

If its a lexus then 35 psi all round is best

Most cars arround 34-35 ps is fine.

I have a Seat Coupe and I have 34psi front and 33psi rear.

I've got a foot pump you can borrow.

Original Poster

kjbenja;7134277

If its a lexus then 35 psi all round is best



bmw 318i matey not the standard wheels so cant do a reg check:thumbsup:

JBAUERBEATSJBOND;7134309

bmw 318i matey not the standard wheels so cant do a reg check:thumbsup:



I would say 34 psi all round and take it from there :thumbsup:

Isnt it on your tyre?

Isnt it on your tyre?


lmao !!!

AshleyRFC;7134331

Isnt it on your tyre?



juninho7;7134554

Isnt it on your tyre?lmao !!!



Think that's a 'no'.:thumbsup:

best way when you upgrade wheels is to experimant , try between 30 - 35 psi and see which drives and feels the best. no set pressure for non standard size.

Original Poster

Rep to all thanks

Weight of car divided by 4 (No 1) [weight per wheel]
100 divided by Max load of tyre (No 2) [should be on side of tyre]
No 2 x No 1 (gives you the percentage you need)
Max pressure of tyre * xx percent should give you your tyre pressure.
Using ballpark figures to make the above clearer.
ie car = 1000kg
div by 4 = 250Kg
100 div 500kg (max tyre weight taken from the tyre) = 0.2
0.2 * 250Kg = 50%
65 Max PSI * 50% would be 32.5psi
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