Question about ET

Audi A3 (8L) Felgen, Reifen & Fahrwerk (8L)
1

Hi,

i am about to order my wheels but i have a question before ordering, concerning the ET.

The wheels can be delivered in different ET’s and i was wondering if i order a wheel with ET 30 will it then look different from the same wheel but with etc. ET 72 ?

What i think of is if the whole midle part is changed or is it only the mounting block which is thicker on the wheels with ET 30 ?

It is a bit difficult to describe what i mean soo i have tried drawing what i mean on a picture.

The picture is here http://www.expostyling.dk/martin/rh.jpg

  1. Changes the size of the mounting „block“ which then changes the ET but not the actually apperance of the wheel (no matter which ET, the wheels look the same).

  2. Changes the whole middle part, this will of course change the apperance of the wheels depending on which ET they are made with.

The reason why i want to know this is of course that if it is like on nr 2 then wheels with a low ET will look to be deeper.

But the reason why i think it is nr 1 is because it is easier to make and have different sizes only by changing the middle part (the wheels are 3 parts). Also when constructing wheels the center probably have to be some certain place to give the best stability soo it cant just be change (as it would on nr 2).

But i hope some of you might know a little about this ?

Martin… :slight_smile:

  • Dieser Beitrag wurde von MartinF am 25.06.2004 bearbeitet

2

How many parts does your wheel have? 1, 2 or 3?

If the wheel contains of 3 parts, your wheel looks deeper with ET 30 because the outer part is deeper and the inner part is thiner…

So the middle part is in different posisions.

Hope you understand what I mean…

Do you hav a picture of the wheel?

3

Also
Die Et ist ja irgenwie der Abstand zur Radmitte.
Eine ET 30 hat mehr Tiefbett als eine ET 72 würde ich jetzt mal sagen.

Aber eine ET 72 bekommt man ohne Spurverbreiterung nicht auf einen A3 und soviel Spurverbreiterung bekommt man glaube auch nicht eingetragen.

Hoffe ich habe das richtig erklärt.

Zum übersetzen:
http://www.google.de/language_tools?hl=de

Thus the Et is the irgenwie distance to the wheel center. A ET 30 has more low beds than a ET 72 I times would now say. But a ET 72 one does not get without trace widening on a A3 and as much a trace widening does not get one believes also registered. I hope that correctly explained.

Boris

4

:lolhammer:

Jepp, ist eigentlich richtig, aber es gibt tatsächlich auch (meist 1-teilige) Felgen bei denen sich nur die Radbolzenaufnahme unterscheidet.

Bei 2-oder 3-teiligen Felgen, setzt sich die ET meist aus dem Verhältnis Außenschüssel - Innenschüssel zusammen – der Stern verschiebt sich entsprechend nach Innen/Außen

  • Dieser Beitrag wurde von sippel am 25.06.2004 bearbeitet

5

Hello,

i know how ET is calculated. :slight_smile:

The wheels are the RH AL - Cuprads (3 parts), they are made with different ET’s and i will of course need to use their adapter system.

But my question is more about how the ET is made on the wheels, if it is by chaning nr 1 or nr 2 marked on the picture.

If its is changed by changing the size of nr 1 (marked on the picture) then the apperance of the wheels are the same whether i buy 9½ x 19 ET 72 or ET 59. (when looking on them but of course ET 59 will stick more out than ET 72 but i will take care of the right ET with adapters anyway soo they fits - i am only talking about the look of the wheels and the size of the edge).

But if it is like nr 2 then ET 72 would not have as much edge as the ones with ET 59.

I am trying to find out of this because i want as wide an Edge on the wheels as possible, and if it is like nr 2 on the picture, i would get the same size edge by choosing 9 x 19 ET 65 as 9½ x 19 ET 72.

(as the 9" is 1,25 aprox. smaller, with the same ET it is 0,625 cm less edge, but then the ET is 0.7 cm less which then gives me 0,7 cm edge and then the edge is the same as 9½x 19 ET 72)

hope you understand what i mean

  • Dieser Beitrag wurde von MartinF am 25.06.2004 bearbeitet

6

Actually i think Sippel have answered the question i am just a little confused how it should be understood

:verwirrt:

7

Think i found an easier way to ask :wink:

Look at this picture http://www.expostyling.dk/martin/3partwheels.jpg

If part 1 is changed to increase or decrease the ET then the size of the edge is of course also changed.

If it is part 2 which is changed the edge will be the same no matter what ET.

Anyone who can tell me which part is changed to increase or decrease the ET ?

It sounds most logical that it was part nr 2 which was changed as they could just make one size of part 1 and 3 for one size of the wheels and only change part 2 to make the different ET’s.

But of course not everything is logical in this world.

Which one of them is changed ?

Martin … :slight_smile:

8

I got 3-part-wheels, too.

I’ve chosen 10x18 ET 45 for the new A3.

I had the possibility to choose between ET 51, 45 and 32.

ET 51 I don’t know anymore

But 10x18 ET 45 means part1 7,25’’ part3 2,75’’
ET 32 6,75’’ 3,25’’

So as lower the ET as deeper is the edge (in most cases)

9

Hi,

thanks a lot for the help, i think i have understood now :slight_smile:

damn … i have hoped that it was part 2 which was changed.

Is it correct then when i say that i wont get any more edge when buying 9½ x 19 ET 72, instead of 9 x 19 ET 65 ?

What i mean is that ½ inch is 1,25 approxmatly.
The wheels is then 0,625 wider on each side of the center (which of course gives 1,25 cm wider in total).

Soo 9½" would give me approxmatly 0,625 wider edge than 9" if it was the same ET.

But as the ET is 7 mm bigger on the 9½ then the edge is the same no matter which one of them i choose.

I have the A3 8L and to have 9½" x 19 on it i need to have an ET somewhere around 45-50 in the back.

But the wheels are only possible in the following sizes and ET’s

AL 9,0x19 = ET15, ET27, ET40, ET52 and ET65
AL 9,5x19 = ET21, ET33, ET47, ET59 and ET72
AL 10 x19 = ET27, ET40, ET54, ET65 and ET77

the smallest adapter is 20 mm. Soo either i will have to take the 9,5" ET 72 and use 25 mm adapters or take the 9" ET 65 and use 20-25 mm adapters.

as far as i can calculate.

Martin… :slight_smile:

10

by the way i really hope i am calculating something wrong …

as it would mean that 8½" ET 59, 9" ET 65 and 9½" ET 72 all have the same size edge.

I really hope that is not true because that really sucks as i want a big edge in the back.

If they had just changed part 2 instead and made the mounting block thicker depending on the ET, all 9" would have the same size edge and all 9½ would have a bigger edge and the same size no matter which ET … :heul: :heul:

11

Can anyone tell me if my calculations are right ?

i really want to order the wheels now but if the edge will be the same no matter if i order 8½ or 9½ it really sucks.