i think i finally found my wheels...on a 2003 c4 nb the oem rec. for front is
44-50 et...the ones i found are 40et(151rt) for front and recommend 45-60 in rear....60 et (152rt) for rear...will the front stick out a bit? or will i need a spacer to come up flush. they are 18's 8.5 and 10.5 in rear

tell me it will work..so i can stop bothering you guys. thanks

 

Sorry, your OEM figures are confusing. What exactly is the ET figure: front and rear. Also, OEM rim widths would apply. Assuming your widths are 8 F and 10 R, and your OEM ET's are 50 F and 60 R, your front would stick out about 1/2 inch, and your rear should be fine without spacers.

 

the techarts i want to get are 18 x 8.5 et 40 front
18 x10.5 et 60 rear

would this work

 

They should just fit on on the front. You may get a small amount of rubbing on the inner wheel liner at full steering wheel lock but I think you will be O.K....definitely no need for spacers on the front as that would make them stick out too far.

The front will look more aggressive than the rear. You could install them then and evaluate how the balance of the front-back offset looks...you could then decide to put a small (5mm) spacer on the rear to even out the look.

 

They should work. I can attest to the rear size because I have Carrera IVs on mine which are 18x10.5 with an ET of 60mm. It is flush with the fender and within Porsche's recommended max of an 18x11, et 63.

The fronts that you're looking at should fit but may rub at full lock. You definitely do not need spacers for the fronts.

 

+ 1

 

I don't think a spacer would fit in the rears without rubbing. I think you would have to roll the fender lip if you add the spacer.