S4 / RS4 (B5 Platform) Discussion Discussion forum for the B5 Audi S4 & RS4 produced from 1998-2002

What does the caliper size difference from an A4 to an S4 equate to in regards to "Spacer"???

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Old 05-13-2003, 06:28 PM
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Default What does the caliper size difference from an A4 to an S4 equate to in regards to "Spacer"???

<center><img src="http://www.radius-autotech.com/images/R8big.jpg"></center><p>Basically I'm trying to figure out the following:
If there is a wheel that i know for a fact fits a B5 A4 and i want that wheel on my S4, what is the worse possible scenario for Spacer size to make the wheel fit? 3mm? 5mm? 10mm? 15mm?

The novice in me would think a 5mm should be more than enough.....
Old 05-13-2003, 06:56 PM
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you would probably need a longer bolt too.
Old 05-13-2003, 07:14 PM
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Default Re: What does the caliper size difference from an A4 to an S4 equate to in regards to "Spacer"???

A quick measurement from wheel mounting surface to outer caliper edge:
S4=1-3/4" (new pads)
A4=1/4" (half worn pads)
So if you add about 1/4" to the A4 for wear the difference is about 1-1/4" or 30mm. The inner contour of the spoke will make up some of that.
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