[urq] CQ & urq Rear brake upgrade & Comparison

Eric Renneisen racingiron at comcast.net
Tue Jan 15 16:09:48 PST 2008

I've found the Brembo online catalog is usually a good source for rotor
dimensions.  The key is to use the UK catalog rather than N. Am.  In
this case (CQ rears) the N. Am. catalog just gives some basic
dimensions, but the UK listing shows the full diagram.  You just have to
be sure that you're looking at the right rotor since they have so many
more choices over there, but the Audi P/N is right on the diagram.  The
rear CQ rotors are shown with a 32.5 mm offset from the inboard face of
the rotor to the hub mounting surface of the hat.

As for the calipers, ETKA ATP is your friend.  The CQ caliper P/N
matches the mid '89-'92 80Q/90Q, '89-'94 100Q, 200Q (MC, except avant),
'95-'98 A6Q, and '97-'99 A8.

Eric R.
'86 urq
'92 urS
'93 urS

-----Original Message-----
From: urq-bounces at audifans.com [mailto:urq-bounces at audifans.com] On
Behalf Of Todd Phenneger
Sent: Tuesday, January 15, 2008 11:21 AM
To: Andrew
Cc: urq list
Subject: Re: [urq] CQ & urq Rear brake upgrade & Comparison

Thanks for reply Andrew,
On the UR-Q I think I have it figured out.  Seems its the other way
around. IE...you need V8/S4 Rotors.  The 91¹ 200 rotors are the upgrade
for the 5ktq/200 10v Cars. 

As for hubs, 90q uses its own hubs.  They are 4x108 but that doesn¹t
mean much.  What I mean by that is that the hub to rotor mating surface
is the same on all the hubs so you can re-drill a rear set of rotors to
match.  On my 4ktq I¹m running UR-Quattro struts with 5ktq rear Hubs as
the ur-q hubs push the wheel to far out.  Because of this I cant run the
ur-q rotor or the 5ktq rotor.  So I have to run a 4kq rear rotor that is
drilled to 5-bolt. ³ugh².  

I¹m not afriad to put 5-bolts on the CQ as then I can share wheels with
my ur-q which would be nice.  But alas, I cant seem to find the specs
for the rear brakes of the CQ.  IE...Offset of rotor, etc.  I wish there
was a
listing somewhere of Audi Rotors and their offsets.   As well as Audi
and their respective offsets.  I know an S4 front hub pushes the wheel
out ³6mm ?² more than a 5ktq hub.  I¹m not sure where the ur-q hub falls
in here.  I also know a ur-q rear hub has MUCH more offset then a 5ktq /
4kq rear hub.  5ktq/4kq are same offset hubs but use very different
rotors because the 5ktq uses a different caliper and carrier in back.
But you can swap the hubs freely to convert a 4kq to 5-bolt.

Ahhh, To many numbers.

From: Andrew <afinn1 at gmail.com>
Date: Mon, 14 Jan 2008 14:52:26 -0800
To: <tquattroguy at yahoo.com>
Cc: <urq at audifans.com>
Subject: [urq] CQ & urq Rear brake upgrade & Comparison

Todd, if you're using 4KQ hubs... aren't they 4 bolts. Won't work. As
for the rotors I have done this conversion on 2 urqs, so you'd think I
remember, but I think the V8 urS4 rotors don't work, you need the 200
ones (because of offset issues). It could be the other way around, but
I'm pretty sure.....
Andrew Finney
1985 UrQ

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