Doing a 5 bolt swap and have urs front hubs at all 4 corners.

on what car ?

Oops. 91’ 80q. With a 6mm spacer

im not sure if i understand how did you install urs4/6 hub on the rear of a B3 80q

Isnt those are 82mm instead of the 75?

I must use wheel bearing 33412220987 from a bmw e36. And machine the hubs to roughly 42.2 mm according to the guy I got the shafts from

I would like to use urs front and rear brakes but either way they have to fit behind these wheels. The guy said something about using c5 s6 269mm and/or c5 A6 4.2l 269mm rotors but I’m not sure exactly.

ahh ok, good luck with it.

I have hard time understanding why ppl over-complicating a simple thing, like 5 lug conversion with off-shelf parts

Ok thanx. Over complicating things keeps my brain entertained. Cars bring me peace of mind and the ability to stay out of trouble. I also tend to over engineer things. I’m sorry if I frustrate you or anything else for that matter. You help me a lot with information to help build my beloved Audi and I really appreciate you a lot!

my recipe on the rear was for this 90, its has a two pieces suspension, it was a 20V car originally:
B5 A4q rear hub (New bearing, 75mm)
B5 S4 rear disk
B5 S4 rear brake caliper bracket
D2 S8 rear brake caliper, cos its aluminum (urs4/6, v8 rear can be used as well)
(I even used a front forged control arm on the rear)



If your 80 had a 1 piece upright, i would upgrade that first.

It actually came with 2 piece uprights and I just got 2 piece 82mm knuckles. Will the B5 A4q rear hub accept a front B5 S4 outer cv joint?

" I just got 2 piece 82mm knuckles"
for the front. Rear is 75mm

or that where you want to use that bmw bearing, spacer combo?

"Will the B5 A4q rear hub accept a front B5 S4 outer cv joint?"
nope, but B3 80/90/cq/S2 cv/axle will fit

The 75mm rear gets the BMW bearing with a 6mm spacer and a urs front hub machined down to about 42.2mm

got it.

now the interesting part will be to find a caliper bracket, and disk that will fit because the diff. hubs (4-5mm)

He stated If I use urs6 rear brakes I can use a c5 s6/c5 A6 4.2l 269mm rotor

rotor maybe, but still need matching caliper and caliper bracket to line up everything.
not many caliper has the good orientation to pull the e-brake cable

Will a rear urs caliper bracket bolt onto the rear of a B3? Merry Christmas by the way!

Alone it might, but the offset of the ur4 hub and/or disk will make it hard to use


Merry Christmas to you too.

Ok. Thank u for your input! I appreciate it!

I have a set of URS6 front and rear drilled rotors and a set of rear calipers available.


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