Stock Rotor Weight

[mwar99]

Just took delivery of new rotors and pads for the S6. Weighed the front rotors - holy cow- 33.3 pounds each!

Rears were 16.4 pounds I believe. That is a lot of weight for the front wheels.

[Luis_Heineken]

and? completely normal, they are brand new

[kiku]

They are massive aren't they? You don't get to appreciate how big brakes these are until you have them off the car.

But good baseline though. I have a set of front ceramics, tomorrow I'll weigh them to see if any reduction on weight. I doubt it though.

[DeerHunter]

I have a set of front ceramics, tomorrow I'll weigh them to see if any reduction on weight. I doubt it though.

If your ceramics aren't significantly lighter, send them back - lightness, along with fade resistance, is their raison d'être.

[mwar99]

They are massive aren't they? You don't get to appreciate how big brakes these are until you have them off the car.

But good baseline though. I have a set of front ceramics, tomorrow I'll weigh them to see if any reduction on weight. I doubt it though.

It would be interesting to see how much lighter they might be. They are massive and it does make a difference not having them on the car to see how big they really are.

[mwar99]

and? completely normal, they are brand new

So what you are saying is that it is normal that front rotors on any car are that heavy? I thought it was interesting how heavy they are and I don't recall seeing it posted here.

I weighed them because I need to see if anything was missing from the box they came in as it busted open and the weight was almost 67 pounds. I needed to see if there had been brake pads in there (they were in another package). I know they are huge, but I was still surprised how heavy they are and thought someone else might find it interesting. If you didn't why did you need to post?

[mwar99]

Clarify please. You bought OEM rotors and pads?

Yes OEM

[mwar99]

You weren't interested in those fancy slotted/drilled/whatever rotors? They supposedly weigh less. Nice car you have ordered...

Not at this time. Since I am getting the other nice car (Thanks! :-)) I am trying to limit other expenses and thought the OEM might cost me a little less... I could be wrong, but didn't have too much time for research. Impressed I got almost 44K miles out of the originals.

[ToeBall]

I've fired off an email to RacingBrake.com to see if they're planning on offering a stock 2-piece replacement. It should shave some substantial weight. I don't know that I want to go to Stasis front brakes on my TDI, though I have a set on my other car.

[DeerHunter]

I've fired off an email to RacingBrake.com to see if they're planning on offering a stock 2-piece replacement. It should shave some substantial weight. I don't know that I want to go to Stasis front brakes on my TDI, though I have a set on my other car.

Such an offering might be useful for a standard A6, but the S6 front brakes already use a trick 2-piece floating design with aluminum hat. An aftermarket offering won't be substantially lighter, unless they start removing material from the friction ring (rotor) - which is not a good idea.

[kiku]

If your ceramics aren't significantly lighter, send them back - lightness, along with fade resistance, is their raison d'être.

So interesting enough, the 420x40mm 2008-2011 RS6 ceramics are already a significant weight savings over stock, but the C7 ceramics generation is even lighter.

I don't have any actual weight numbers yet, so its just a feeler so far and may be a waste of a post :)

[LittleDevil]

Weight saving. Weight difference between S7 and RS7 ceramic is because RS7 have aluminium hats.

RS7 Steel Brakes 390/356mm:

Front Calipers with Pads and Wear Sensors = 8.05kg each
Rear Calipers with Pads and Wear Sensors = 5.60kg each
Front Disc 390x36mm = 13.80kg each
Rear Disc 356x22mm = 7.25kg each

RS7 Ceramic Brakes 420/370mm:

Front Calipers with Pads and Wear Sensors = 9.75kg each
Rear Calipers with Pads and Wear Sensors = 6.50kg each
Front Disc 420x40mm = 8.25kg each
Rear Disc 370x30mm = 4.55kg each

S6, S7, S8 Ceramic Brakes 400/370mm:

Front Calipers with Pads and Wear Sensors = 9.75kg each
Rear Calipers with Pads and Wear Sensors = 6.50kg each
Front Disc 400x38mm = 8.45kg each
Rear Disc 370x30mm = 6.75kg each

Kind Regards

[LittleDevil]

S6 are even heavier than RS6 Steel 390mm wave design.

Kind Regards

[sparkhill]

Here is an interesting tidbit I remembered reading:

"One of the RS7's weight savers is a “wave” design for the standard steel brake rotors, measuring 15.5 inches in front and 14 inches rear with six-piston calipers. The disks' outer edge is machined with a unique scallop shape shaving unsprung weight 6.6 pounds. The carbon-ceramic option—available in North America when DRC arrives—sheds another 33 pounds."

Autoweek RS7 Review

[smokey24]

They got a 2 piece now

http://www.audizine.com/forum/showth...1#post12409584