HunkyDory

Hi all.
A few weeks ago i got a 2011 3.0 Tdi with very few miles.
Amazing car!
I'm currently on the 17" winter tyres.
The summer tyres are only 18"
I will try to get 20 or rather 21" for the summer.
But not sure what wheels will work.
I understand they are 5x112.
I also see different ET numbers. 35, 42...and so on.
What is this?
So what numbers should i look at? What will work?
Do the S7,S6 wheels work? Mercedes wheels?

Sorry for poor english.
Swedish guy.

Tia

MP4.2+6.0

Short version: Get wheels to fit either D4 A8 or S8, or ones to fit C7 A7, S7 or RS7. I would get factory original equipment (OE). For European purposes, sites seem most commonly to call those "original" when you search.

The specification will be 20 x 9, meaning 20" by 9" nominal tire width. They will be ET 37 Or occasionally ET 35, meaning 37 mm offset. The hub center will be 66+mm (and importantly not 57mm which are the prior generation ones). The bolt pattern will be 5 x 112, meaning it uses 5 bolts at a 112mm radius from hub center. Again, the D4 OE wheels and the C7 A7 S7 wheels are basically the exact fit ones The C7 A6/S6 ones have too conservative an offset--meaning they are under the fender too far on a D4--and usually only go out to an 8 ½" spec width. Q5 wheels work too, but only go to 8 ½" spec wheels. So do A5/S5 wheels, but those either are not 9" width or if they are, usually stop at 19".

Yes FWIW, the wheel bolt up spec is interchangeable with many Mercedes. But they usually have offsets more like the current A6/S6. Look on eBay.de given your location. There are always a lot there, and many are private sellers and so likely no VAT, plus ship to most of Europe. The OE ones are strongest, and some of the designs actually forged. Simplifying, if it is a polished face and width the sizing and Audi part information machine punched into wheel, it is one of the forged ones. If it is painted and the sizing and part information in the metal casting, then it is cast. Forged means stronger and lighter for a given wheel.

Search that works for me on eBay.de is something like Audi 20 original alufelgen. Or felgen. Be sure to set it for search all of EU too. Sometimes the word zoll is used too, but I usually don't bother. You can also put in -Q7 which never fit--completely wrong bolt pattern until the new body ones) and -Q5 which are numerous but never in 9".I also play with factory, OEM and stock instead of original, but more for U.S. eBay searches. I have a strong preference to OE--they look right on car, stand test of time design wise and keep much better value. Plus can get a replacement if you bend or damage one, which is rare. Since you are in Europe, shipping may still be cost effective including tires. To the U.S., shipping is a lot so then I look without tires. If with tires, the wheels need to come off a D4. The A7/S7 ones are one size (aspect ratio too low--35 instead of 40. I have seen them on eBay.de both with tires and wheels only.

HunkyDory

Thank you very much.
Verry appriciated!
Now i know alot more.
Will do my search for 21" not only here in Sweden, but also in the rest of Europe.
I see big price differences between here and down in Germany.

Thanks again

MP4.2+6.0

Sure. 20's should be cheaper. For both wheels and the tires. All the factory forged ones are 20's too; the 21's are a fair amount heavier.

HunkyDory

A guy is selling his 21".
They are from a 09 Rs4.
They are 285/30-21.
He doesn't know the et.

Will they work?

MP4.2+6.0

Well, RS4 would never have come with 21's, so that info right off the bat is more than suspect. Certainly not a 285 in that era either. A guess is these are replicas if actually 21's, since only Audi OE wheels that ever came in twin 7's like those in 21's were Q7, which wouldn't begin to fit on RS4 or D4 bolt pattern wise. These could be D3 20's too... in which case that part of the listing is wrong too. Those could be OE and nice, but won't fit D4 either.

If these are D3 wheels, center bore is wrong at 57mm, plus offset more conservative. If these are Q7 wheels, total non starter. If these are replicas, dime a dozen and buy new for what you want. And finally if these were bolted on a 2009 RS4, still need to know center bore. Center bore transitioned to 66mm with D4, and somewhere in last 5-8years also went up on the B bodies like RS4. The A5/S5 and Q5 all switched at outset, then A4/S4 caught up later.

Net, 95%, strike one, strike two, strike 3, batter ... To go anywhere, have seller send you a picture of the part # and ET and size stamping. Probably on inside of hub area near center--if legit that is and with an Audi part # and stamped into metal. If cast into a spoke, those are the wanna be downscale cost reduced wheels used on some other Audis like C7 A6/S6. Speculation is either D3 20's (nice but non starter) or Q7 21's((laughably wrong but only good way I know of to explain the 21 besides fake/replica). Only if D4 (or C7 S7) 20's do you have something to work with. The part # should start 4H0 for those and will have a 37ET in 20 x 9. The D3's will say ET46, the give away they are the older ones. Q7 who knows, but non starter bolt up wise.

HunkyDory

Thanks so much!
Apparently not correct information from the seller.
He stated in the ad they were original Audi rims.
I will contact him tomorrow with the questions you said.