tyre pressure - BMW Forum

epaul197 · 07-31-2003, 04:34 PM

I have a 1997 328i coupe with the m3 motorsport alloys with 225/45/17 tyres what should the pressure be full laden 2 adults and 2 teenagers and a boot full.
Thank you in advance

GreenDragon · 07-31-2003, 04:37 PM

Check the door jamb on the driver's side. It should show tire pressure there.
Might not be for those exact tires, but it'll give you something to go off of.

epaul197 · 07-31-2003, 04:47 PM

these wheels have been put on after market, the handbog with the car only goes up to 16" wheels for a 328i

GreenDragon · 07-31-2003, 04:49 PM

Damn. Sorry bro! I'm sure someone else on the site has teh answer for ya.

triggrhaapi · 07-31-2003, 04:55 PM

Cam, M3Style95, TMD, or Desmo should have the answer...

DesmoBob · 07-31-2003, 06:44 PM

not sure about 245, mine came with 235 stock ('95), but it should be close.

33 front, 36 rear.

DesmoBob · 07-31-2003, 06:49 PM

oops, i misread that, my eyes saw 245 instead of 225.

but it should still be pretty close to that.

with non-stock 225 to 245 wheels, some peeps on the m3 forum have gone +/- 1 or 2 psi. if you're fully laden, i'd go on the + side.

triggrhaapi · 07-31-2003, 07:34 PM

Good stuff, thanks Desmo.

DesmoBob · 07-31-2003, 08:42 PM

k, i looked at door jamb (these numbers are for 235 tire)

with "3 adults" it is this:
front = 33, rear = 36

@ full capacity it is this:
front = 36, rear = 42

it appears there is quite a bit of latitude in the psi (F 33-36, R 36-42), so any number in between (closer to the upper end of the spectrum) should suffice, since you'll have 4 adults plus cargo.

Furious · 07-31-2003, 09:25 PM

isnt it 34 in front and 36 in the back? (they are offset because bmw does it to promote oversteer)