The definitive tyre / wheel size thread

Just put my A8 wheels back on this afternoon

b8d0b38dbf93ec59639e7f021982aaf5.jpg



Sent from the future
That looks amazing Steve!! ? love the rear spacing there. Those wheel seem to fit the design theme of the a2 and look really modern at same time
 
I’m already running 5 x 112 adapters on the car (it’s currently got a8 winter wheels as pictured below) so I’ve no issue with that.
View attachment 89968

Just need to investigate the offset issue before deciding on proceeding.
Jeez, are those 16"? Should be. Those are quite rare/expensive ones to let the salt eat them in the winter ? They are forged so pretty light as well

TBH I want them so baad :D
 
Jeez, are those 16"? Should be. Those are quite rare/expensive ones to let the salt eat them in the winter ? They are forged so pretty light as well

TBH I want them so baad :D
They are currently summer only as I swap onto 15 Pepperpots in the winter. Unfortunately this means removing the adapters as well which I’ve found more than doubles the change over time.

You’re probably right, they probably would get the summer gig when it came to it.
 
This isn't really a current issue but just to confirm I understand this right: If for example I liked to fit these wheels to an A2, I would need 10mm spacers from 5x112 to 5x100? These wheels are 5x112 7Jx16 ET45, so with the spacers they would be 5x100 7Jx16 ET35 and fit ok?
 
This isn't really a current issue but just to confirm I understand this right: If for example I liked to fit these wheels to an A2, I would need 10mm spacers from 5x112 to 5x100? These wheels are 5x112 7Jx16 ET45, so with the spacers they would be 5x100 7Jx16 ET35 and fit ok?
In theory, yes but I believe the adapters you speak of are generally at least 15mm thick which would bring the wheels out to an et 30 and would still fit but be fairly flush with the outside of the arches ?
 
This isn't really a current issue but just to confirm I understand this right: If for example I liked to fit these wheels to an A2, I would need 10mm spacers from 5x112 to 5x100? These wheels are 5x112 7Jx16 ET45, so with the spacers they would be 5x100 7Jx16 ET35 and fit ok?

I've seen these kinds of adaptors in 25mm, 30mm, and 35mm thicknesses.

I doubt you will find anything thinner than 20mm that converts 5/112 to 5/100.

205 tyres on a ET35 offset would be near the maximum before rubbing occurs.

Someone was getting rubbing with 205 tyres and an ET31 offset, so I wouldn't even fit 15mm spacers if they were available to convert 5/112 to 5/100.

Those 7Jx16 ET45 5/112 57.1 pepperpots weigh about 7.3kg each. Add in the weight of adaptors, which could weigh about 1kg each depending on thickness (they also use 10 wheel bolts, not 5 so that's even more weight to add) and you've got a lot more unsprung weight than 6Jx15 ET38 5/100 57.1 pepperpots.

Maybe look at 195/55R15, 205/50R15, 205/55R15 fitted to 6.5Jx15 ET34, and 205/45R16 fitted to 7Jx16 ET34 alloy rims from the Audi A1.

28X0 601 025aluminium rim
D >> - 10.12.2012
colour code:
6,5JX15H2 ET34
5/100
8Z8
4PR-C2V
(2)8X0 601 025 AQaluminium rim
D - 10.12.2012>>
colour code:
6,5JX15H2 ET34
5/100
8Z8
4PR-C2V
38X0 601 025 Haluminium rim
D >> - 10.12.2012
colour code:
6,5JX15H2 ET34
5/100
8Z8/K80
4PR-C5L
(3)8X0 601 025 ANaluminium rim
D - 10.12.2012>>
colour code:
6,5JX15H2 ET34
5/100
8Z8/K80
4PR-C5L

1642513160030.png


18X0 601 025 BBaluminium rim
colour code:
7,0JX16H2 ET34
5/100
8Z8
4PR-CT3
28XA 601 025 Aaluminium rim
colour code:
7,0JX16H2 ET34
5/100
8Z8
4PR-C3T
38XA 601 025 Caluminium rim
colour code:
7,0JX16H2 ET34
5/100
JG3
4PR-C4E
48XA 601 025 Ealuminium rim7,0JX16H2 ET34
5/100
8Z8
4PR-C5X

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Thanks for the comprehensive explanation and advice. I didn't plan to fit those wheels, I just wanted confirmation that I understand how these things work in theory. I haven't understood wheel measurements properly before but I think I got hang of it now :)
 
I haven't really got the time to reply atm as I'm busy working but felt I must.

Please ignore the advice above as the member (although obviously taking a lot of time to help and unquestionably with the best intentions) doesn't seem to understand or have the practical experience of how wheels and tyres work.

The only issue you will have with potential rubbing or fouling is inwardly ie the inner wheel arch linings (like in the photo below) caused by either too high an et number, too wide wheels (or both) or tyres that are too large, or possibly all three!

What I said previously is the correct advice and will work perfectly. An et of 31 has less chance of rubbing when fitting wider wheels or tyres than an et of 35 not more. The issue mentioned above regarding rubbing with a 205 section tyre will have been because the rims were wider at 7.5j combined with too high of an offset.

Below is a photo of a suitable 15mm 100 to 112 adapter that I mentioned ?
 

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Thanks, I believe I understand what you mean. For a moment I was a bit confused but all is clear now ?
 
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I haven't really got the time to reply atm as I'm busy working but felt I must.

...
Yes and no. Of course if you get wheels 8" wide and ET 60 it will rub as you shown. On the other hand, if you put on your car 8" wide rims and ET0 it will rub as well. But not on the inside face but the outside edge of the tire in full lock. Those are the two extremes that needs to be considered. Of course the first one is more likely to happen but in case of lowered car the second option is also possible ;)
 
Yes and no. Of course if you get wheels 8" wide and ET 60 it will rub as you shown. On the other hand, if you put on your car 8" wide rims and ET0 it will rub as well. But not on the inside face but the outside edge of the tire in full lock. Those are the two extremes that needs to be considered. Of course the first one is more likely to happen but in case of lowered car the second option is also possible ;)
Yes but you are now taking things to extremes as you indeed state yourself.

I was simply answering a question that someone asked accurately and with experience to assist them, so I didn't expect to be contradicted in the next post by someone spending hours referencing Internet sites and providing inaccurate and incorrect information.

I think a little common sense would help and maybe we need to remember what these cars are about and intended for.

They are not Nissan Skylines or Toyota Supras so if you're talking 8" wide rims with an ET of 10 and lowered suspension to argue the accurate facts I state then I'm sorry but I think that isn't intended to help anyone!
 
You may be wondering.

Anyways, I feel you are pushing the discussion unnecessarily offensive in my opinion. And there is no need for that at all. I felt the need to mention the opposite problem as well as there are people running 17" wheels, bigger size tires etc. Not everyone is running pepperpots ;) And regerding the Erlingtheyoungers post, second variant (mine) seemed to me way more possible than yours.

In case anyone wondering what wil cause different ET, tire size, rim width etc. you can take a look at web tool like willtheyfit.com where it shows you the difference ;)

peace ✌️
 
Does anyone know the name of these wheels? They should be from A3, 15 inch, 5x100. What is the ET and J?
I also think that they do not have the original paint, but were repainted...
Wheels.jpg
 
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