Alloy tyre info for a4 needed

[the-stigg]

I have 2005 a4 s-line with genuine 18" rs4s on, i want to put the s3 double blade replica 18" on instead

are these none genuine alloys inferior to genuine ones

also can you put any size of 18" tyre onto an 18" alloy

any help appreciated

[Corb2000]

Various online tyre / wheel calculators allow you to test tyre and wheel combinations. The first one listed (alloywheels.com) also gives you the range of rim sizes for each tyre. Best to avoid the extremes of the allowable range just to allow some room for error and avoid any odd handling effects, ie don't go for the absolute widest tyre allowable for any given rim size...

http://www.alloywheels.com/tyrecalc.asp

These calculators just compare the diameter of various tyre sizes....

http://www.etyres.co.uk/tyre-size-calculator.htm

http://www.tyresave.co.uk/tyresize.html

I've got repro RS4 wheels and don't think they are as well made and finished as the OEM wheels plus the centre caps are not interchangeable wirthout a bit of adaptation. Still look the biz though!