Wheel Fitment

C

czechT698

Active member
 Prague
Hello,

I need help with wheel fitment...

Front:
18x8 ET6

Rear:
18x10 ET19

Car: Z4 2.5i


Will they fit??

Thanks very much! :driving:
 
The front should fit, but the rear looks a little too big for the 2.5i. There are quite a few more knowledgeable people around here that should be able to give you a definite answer.

Edit: just took a second glance at the offset for the front,,,gonna be real hard to make that fit properly.
 
damn, thanks ovrkll, thats bad I fell in love with those wheels. :( maybe I sould reconsider, anyone else have some info they could share?
 
Viewing the suggested tires (Oz) through the TireRack link, it comes up with:

Front: 18x8
Offset: 40mm
Backspacing: 5.98"
Bolt Pattern: 5-120
Rec. Tire Size:225/40-18


Rear: 18x9
Offset: 45mm
Backspacing: 6.69"
Bolt Pattern: 5-120
Rec. Tire Size:245/35-18
 
the tires those I am interested in come with F: 225/45 and 265/35 Rear :| what bothers me is that there is a chance it might rub on the fender
 
The front would only fit if you don't mind driving around without front fenders and liners. Rear wouldn't fit very well either.
 
czechT698 said:
the tires those I am interested in come with F: 225/45 and 265/35 Rear :| what bothers me is that there is a chance it might rub on the fender
Click to expand...

Go with 225/255, or 235/255, or 235/265. 225/265 will induce more understeer and worse handling.
 
10" rims on a 2.5 ?? You have to be kiddin' Why not just have a body lift and go dual wheel

You'll also hurt the performance with that much more unsprung weight of rim and tyre. Will feel more like a 2.0
 
so what the right offset that looks best and doesnt decraesed the power of an 2.5 l ???????????
 
I have no idea what offset you need in an attempt to get a wheel in that is 3" wider and 2" greater in diameter than the standard 2.5 spec wheel (Style 104 7J 16" running a 225/50R 16 tyre). Even the 3.0 only goes up to an optional 8.5J rear 18", so a 10" rim on a 2.5???

Of course the wheel size does not decrease the engine power per se, however it raises the effective gearing and reduces acceleration by sapping power trying to spin up all of that increased radial mass.
 
Here's a link that might explain how the offset is calculated:

http://www.wheelcentre-scotland.co.uk/acatalog/fitment.html
 
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