[s-cars] S4 brake rotor spec question

[Jacobson, Steven F (Steve)]

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Does anyone know if the S4 brake rotor thickness specs in Bentley are wrong=
 or out of date?

My Bentley shows:
Front rotors
New: 30mm (1.18 in.)
Wear limit: 28mm (1.10 in.)

Rear rotors
New: 20mm (0.79 in.)
Wear limit: 18mm (0.71 in)

But, I just noticed the urs4 site says the following under Technical -> Bra=
kes
Front - 276 x 25 mm, one-piece, vented
Rear - 269 x 25 mm, one-piece, vented

So, there appears to be a 5mm discrepancy on front and rear between Bentley=
 and the urs4 site.  Anyone know the real truth - book out of date or if Au=
di made a design change somewhere along the way?  I haven't taken the obvio=
us next step of pulling a wheel and measuring one.


Steve
'93 S4
'92 100CS