Radius of brake calipers and dust shield

4.0 V8 40v biturbo TFSI - 591 bhp
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Radius of brake calipers and dust shield

Post by Jimminez » Mon Aug 31, 2020 3:08 pm

Wondering if anyone has measured the radius of the brakes? I know the diameter of the ceramic rotors is 440 mm and believe the radius of to outer edge of the caliper is approximately 249 mm, but I think the dust shield may bit a bit wider than the caliper itself and was hoping someone has or could confirm.

Wheel manufacturers have have drawings of the calipers and rotors but not the dust shield which I think would be the limiting factor in wheel sizing (my S212 E63 dust shields for example). Living in a climate that requires snow tires, being able to use a 20" wheel is desired by some but even some 21" wheel designs don't clear.

Any help would be appreciated.
2019 RS5 Sportback | Milltek Race | Advan GT | ABT HAS | AWE AirGate | 034 MS

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Re: Radius of brake calipers and dust shield

Post by Audi Fanboy » Wed May 24, 2023 3:50 pm

Hey actually looking to order an RS6 and also wondering if 20 in wheels would fit. Did you ever get an answer?

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Re: Radius of brake calipers and dust shield

Post by Longy_UK » Fri Jun 16, 2023 11:11 am

I understand that 21's were the smallest wheels offered as they were the smallest that would fit and the 22''s were the upgrade.

I don't have measurements but I know when I wash my car I struggle to get my fingers and a cloth between the guard and the wheel and I have the 22's.

I don't know for certain but id expect 20's will foul the guard.
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