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Old 01-23-2006, 04:09 PM   #1
aWeX
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Default New gold O.Z. Ultraleggera's on STI (pics)

After seing this thread, I figured I might as well post some super-secret spy pics taken sometime last summer, when my boss visited the OZ-factory in Italy. His tyre/wheel-shop is Norways biggest OZ-retailer, so the OZ importer gave him a free trip to Italy

Anyways, this car is owned by one of the bosses at the factory. He had to register it in Germany to be able to run 18" wheels, since Italy apparently has some strange law prohibiting you from fitting larger-than-stock wheels on your car

You can see that they are branded as Superleggeras, this was before the Ultraleggera was released. The last two pics are from outside OZ`s testing facility. All the busted wheels had failed the tests that the Ultraleggera passed (He said it was 25% stronger than the Superleggera). OZ and McLaren are the only ones besides TÜV (german testing/certifying (sp?) agency) that has the equipment to do such tests. A lot of wheel manufacturers use OZ to test their rims. Bla bla bla, here are the pics:




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Old 01-23-2006, 04:17 PM   #2
ej20_876
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wow those are some cool pics. does anyone know what kind of strength tests they actually perform on these wheels?
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Old 01-23-2006, 04:39 PM   #3
aWeX
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Quote:
Originally Posted by ej20_876
wow those are some cool pics. does anyone know what kind of strength tests they actually perform on these wheels?
I have no idea, but they are supposed to be harder than the tests TÜV implement on the products they certify. OZ does an angeled lateral impact-test, and if I remember correctly, they are the only company that does this.
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Old 01-23-2006, 04:41 PM   #4
Luke@tirerack
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BBS also has the same test equipment and performs the same "TUV" approved testing ...... but, those are the only 2 companies I know of that have that ability
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Old 01-23-2006, 04:52 PM   #5
aWeX
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Quote:
Originally Posted by Luke@tirerack
BBS also has the same test equipment and performs the same "TUV" approved testing ...... but, those are the only 2 companies I know of that have that ability
My guess is that you know a lot more about this than me
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Old 01-23-2006, 04:54 PM   #6
Justin80
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Nice wheels.
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Old 01-23-2006, 07:08 PM   #7
PRODRIVEN
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I had superleggaras on my old RS and loved them. Never had a problem with them. My friend on the other hand has them on her A4 and has had numerous cracks in the wheel and causes her tires to go flat. I'm trying to get her to get rid of them and go back to stock Audi wheels
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Old 01-23-2006, 08:27 PM   #8
bal00
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Quote:
Originally Posted by ej20_876
wow those are some cool pics. does anyone know what kind of strength tests they actually perform on these wheels?
I'd assume the tests are similar to what the TÜV does, which is:
-dimensions + tolerances (concentricity, trueness etc.)
-material (alloy, strength, corrosion characteristics)
-corrosion test (salt water spray test)
-radial fatigue test (at 250% of the load rating and 66 psi tire pressure)
-cornering fatigue test
-rim flange load test (has to withstand a certain force before pressure loss occurs)
-impact test (wheels have to withstand a 1100lb weight getting dropped on the rim flange from 230mm)
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