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No and no. Ventilated won't fit the stock carriers, neither will 12mm thick without a bit of grinding. Having done many track days with the stock 245x10 discs, I'm still here...
Hmm...still think non-ventilated is so, well, 1986.
RS2'd 93 UrS4 5 spd sedan
94 UrS4 V8 6 spd manual avant
That 302mm disc is one of 3 that Audi offer with different hat heights, hence not seeing it the first time. It's got a hat height marginally larger than the OE disc but the thickness is 12mm, so that causes a little bit of an issue with the OE carriers and more than likely, you'd have to fit new pads one by one.
There is a 302mmx12mm disc that matches well to the disc that I've got, which makes a multi-purpose bracket very simple.
Cheers'en, AndyC
1994 ABY Coupe - Projekt Alpinweiss
Not directly related but I'm currently working on a 4x108 bolt bigger disc conversion for us that stick with 4 bolt hubs. I'm using Sierra Cosworth 4wd rear discs which are 273x20mm (and have the correct 4x108 holes, only the center hole has to be enlarged slightly) and UrS4 rear calipers Got the rotors for 50 euro and the calipers for 35 euro. I will need to fabricate a simple bracket to offset the calipers, but it will be a simple one. Will make a thread when I have success with it.
Not directly related but I'm currently working on a 4x108 bolt bigger disc conversion for us that stick with 4 bolt hubs. I'm using Sierra Cosworth 4wd rear discs which are 273x20mm (and have the correct 4x108 holes, only the center hole has to be enlarged slightly) and UrS4 rear calipers Got the rotors for 50 euro and the calipers for 35 euro. I will need to fabricate a simple bracket to offset the calipers, but it will be a simple one. Will make a thread when I have success with it.
It's actually for an avant/saloon, forgot to mention that, but it should work also for the coupe, I'm not sure what's the difference between typ85 and typ89 coupe rear struts and hubs...
Right, as I'm still stuck in 1991, I'm now looking in to using discs from a 2005- Mazda and 2007- Audi Will report back when i find the most cost effective selection of parts.
Ideally, I'd like to offer 2 disc sizes so that the rear brakes can be balanced with the fronts for smaller and larger brake setups. I would say that larger calipers up front will be better balanced with larger pistons at the rear but cosmetically, this will be a winner for a modest investment and will function just fine.
I'll have a look at options for 4x108 hubs, in case there's some nice crossover parts between model years.
Cheers'en, AndyC
1994 ABY Coupe - Projekt Alpinweiss
The 278mm brake disc that I was originally looking at using is available in 4 stud (4x114.3) with the correct centre bore, so this would be an ideal crossover
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