Z4-forum.com

Hi l have recently purchased a late 2009 z4 coupe l would like to fit 19" alloys and tyres but do not want to upset the cars handling or have problems with tyres rubbing thanks
Michael

Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

mr wilks wrote: ↑Fri Aug 11, 2017 11:22 am Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

https://www.dropbox.com/s/8gsxy7j26sa1h ... 3.jpg?dl=0

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

mr wilks wrote: ↑Fri Aug 11, 2017 11:22 am Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

ive got et30 18x10J rear 225 rubber

no rubbing

jamie_z4 wrote: ↑Fri Aug 11, 2017 11:36 am

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

mr wilks wrote: ↑Fri Aug 11, 2017 11:22 am Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

ive got et30 18x10J rear 225 rubber

no rubbing

rears are usually fine on z4's it's the front that causes the problems

Buckz wrote: ↑Fri Aug 11, 2017 11:37 am

jamie_z4 wrote: ↑Fri Aug 11, 2017 11:36 am

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

ive got et30 18x10J rear 225 rubber

no rubbing

rears are usually fine on z4's it's the front that causes the problems

true - im on a 205 40 18 front 8.5J et25 - seems i could have got away with a 215 then going off your fronts

jamie_z4 wrote: ↑Fri Aug 11, 2017 11:38 am

Buckz wrote: ↑Fri Aug 11, 2017 11:37 am

jamie_z4 wrote: ↑Fri Aug 11, 2017 11:36 am

ive got et30 18x10J rear 225 rubber

no rubbing

rears are usually fine on z4's it's the front that causes the problems

true - im on a 205 40 18 front 8.5J et25 - seems i could have got away with a 215 then going off your fronts

probably, keep in mind that I'm stock sport suspension.

I have a feeling that on eibachs it'll rub a little and I might have to go for 215's up front. We'll see next year

Buckz wrote: ↑Fri Aug 11, 2017 11:40 am

jamie_z4 wrote: ↑Fri Aug 11, 2017 11:38 am

Buckz wrote: ↑Fri Aug 11, 2017 11:37 am

rears are usually fine on z4's it's the front that causes the problems

true - im on a 205 40 18 front 8.5J et25 - seems i could have got away with a 215 then going off your fronts

probably, keep in mind that I'm stock sport suspension.

I have a feeling that on eibachs it'll rub a little and I might have to go for 215's up front. We'll see next year

ohhhhh yea so you are.

Yea think i'll stick with me 205s then

You might get away with trimming your arch liner

My new fronts are ET37 going to be snug under there

Joycey wrote: ↑Fri Aug 11, 2017 11:53 am My new fronts are ET37 going to be snug under there

I fitted the 313s on mine with coilovers on a 225/35/19 which are the same specs as your style 225M wheels with no issues even at my height.

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

mr wilks wrote: ↑Fri Aug 11, 2017 11:22 am Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

https://www.dropbox.com/s/8gsxy7j26sa1h ... 3.jpg?dl=0

OP has asked about 19s not 18s , does make a difference depending on tyres , springs , roadster , coupe etc , so many factors as discussed many times . there is no one size fits all Zs magic formula

mr wilks wrote: ↑Fri Aug 11, 2017 12:50 pm

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

mr wilks wrote: ↑Fri Aug 11, 2017 11:22 am Aim for 8j front , 9j rears & et numbers around 40
8.5j fronts , 9.5j rears will be more common & will work but definitely don't go under et40 for the fronts , rears will be fine down to low 30s
Once wheel sizes are known choose the tyre sizes to suit & don't just go off whoever is supplying the wheels

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

https://www.dropbox.com/s/8gsxy7j26sa1h ... 3.jpg?dl=0

OP has asked about 19s not 18s , does make a difference depending on tyres , springs , roadster , coupe etc , so many factors as discussed many times . there is no one size fits all Zs magic formula

over-all the size is pretty much the same ? you go up in size and go down in sidewall?

his is a coupe, 3.0, sport. Same as mine

Buckz wrote: ↑Fri Aug 11, 2017 1:47 pm

mr wilks wrote: ↑Fri Aug 11, 2017 12:50 pm

Buckz wrote: ↑Fri Aug 11, 2017 11:33 am

I've got 18's

18x8.5 front et30.. 225 rubber

no rubbing

https://www.dropbox.com/s/8gsxy7j26sa1h ... 3.jpg?dl=0

OP has asked about 19s not 18s , does make a difference depending on tyres , springs , roadster , coupe etc , so many factors as discussed many times . there is no one size fits all Zs magic formula

you go up in size and go down in sidewall?

his is a coupe, 3.0, sport. Same as mine

Supposedly yeah , which is why i said once the wheel size & offset is known then you can decide the tyre size which is as important as the previous 2 sizes .
I said not to go under et 40 as the op specifically mentioned he didn't want rubbing which i interpreted as he'd rather not play the game of chance & end with the usual " it just rubs a very little when full lock or when i go over a certain hump in road " nothing worse imo