New tyre's pressure advice

[gideon87]

Hi all i recently got new alloys for my Z4
front 19" 8.5J ET35 225/19/35
rear 19" 9.5J ET35 255/19/30

and on the tire pressure sticker it shows 2.3 and 2.7 bar for the 18inch options does anyone no the correct PSI/Bar for the new set i have

 

[ben g]

When I had those size tyres fitted, I just used the standard pressures of 33psi fronts and 36psi rears. Seemed fine, if a little bumpy/firm, but that was probably down to the elastic band width side walls

 

[bmwz430si]

I use 34 front 36 rear during winter and 36 front 38 rear during summer on my 19”s because of the terrible Greek roads.

 

[MrPT]

When I had those size tyres fitted, I just used the standard pressures of 33psi fronts and 36psi rears. Seemed fine, if a little bumpy/firm, but that was probably down to the elastic band width side walls

This. 255/30 is going to hurt, whatever pressures your choose!

 

[mr wilks]

When I had those size tyres fitted, I just used the standard pressures of 33psi fronts and 36psi rears. Seemed fine, if a little bumpy/firm, but that was probably down to the elastic band width side walls

This. 255/30 is going to hurt, whatever pressures your choose!

I wouldnt go above those numbers (33 & 36psi ) especially with those tyre sizes on 8.5j & 9.5j rim widths zero comfort for the driver & zero protection for the wheels , hope its not a daily driver op as that is surely going to end with a buckled or split rim

 

[ben g]

When I had those size tyres fitted, I just used the standard pressures of 33psi fronts and 36psi rears. Seemed fine, if a little bumpy/firm, but that was probably down to the elastic band width side walls

This. 255/30 is going to hurt, whatever pressures your choose!

I wouldnt go above those numbers (33 & 36psi ) especially with those tyre sizes on 8.5j & 9.5j rim widths zero comfort for the driver & zero protection for the wheels , hope its not a daily driver op as that is surely going to end with a buckled or split rim

Go any lower than those though and it'll look like you have 4 flat tyres. You'll also meet loads of nosey buggers who want to tell you all your tyres are flat :lol: happened to me loads of times.