[s-cars] S4 brake rotor spec question

[Bob Rossato]

Well, according to the Family Album, Bentley is half right and Jimmy is half
right.

Fronts: 276 x 25mm
Rears: 269 x 20mm

I do recall that the Bentley manual showed a picture of the calipers used on
the 314 x 30mm rotors that we never got in North America, so it may be just
teasing us by giving the specs for the larger rotors that the rest of the
world got.

Bob R.

> -----Original Message-----
> From: Jacobson, Steven F (Steve) [mailto:stevejacobson at avaya.com]
> Sent: Friday, April 26, 2002 3:24 PM
> To: s-car-list at yahoogroups.com; S-CAR-List at audifans.com; Jacobson,
> Steven F (Steve)
> Subject: [s-cars] S4 brake rotor spec question
>
>
> 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 are wrong or out of date?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 -> Brakes
> 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 book out of date or if Audi made a design change somewhere along
> the way?  I haven't taken the obvious next step of pulling a
> wheel and measuring one.
>
>
> Steve
> '93 S4
> '92 100CS
>