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Olig7475 · #1 Post by **Olig7475** » Thu Jul 14, 2011 1:59 pm

about the OZ wheels I have on my bike, they are the genuine OZ rims but the question is are they the aluminium or magnesium version?

Anyone? -

Cheers
Oli

Aladinsaneuk · #2 Post by **Aladinsaneuk** » Thu Jul 14, 2011 2:23 pm

iirc if they have aprilia stamps on them, then they are the heavier version - the original, stamped OZ only are the lighter ones

I am certain that once andy has parked his zimmer he will be along shortly to confirm or refute this

(I think he went with Howard to get their pads changed....)

flatlander · #3 Post by **flatlander** » Thu Jul 14, 2011 2:44 pm

Do they have a product code so that oz could confirm for you?

Aladinsaneuk · #4 Post by **Aladinsaneuk** » Thu Jul 14, 2011 3:00 pm

i believe that has been looked into before and was a none starter

the markings were the key iirc - or, obviously to weigh them - i know andy posted the weight differences before....

https://www.ridersite.com/viewtopic.ph ... eel+weight may be of use/interest

Aladinsaneuk · #5 Post by **Aladinsaneuk** » Thu Jul 14, 2011 3:03 pm

and after a little search - :

The rear 'cast' OZs are 2 piece, as in the 'rear spring drive holder' is held on to the main wheel with 5 bolts.
The forged OZs are one solid lightweight piece of art..........

that should make it very easy to identify now

Olig7475 · #6 Post by **Olig7475** » Thu Jul 14, 2011 3:07 pm

They are the lightweight forged OZ version, but the question I was asked was if they were made of aluminium or magnesium?

HisNibbs · #7 Post by **HisNibbs** » Thu Jul 14, 2011 3:51 pm

Forged alloy. Pretty sure never certain.

hornetrider · #8 Post by **hornetrider** » Thu Jul 14, 2011 4:13 pm

Yeah they're not magnesium.

Olig7475 · #9 Post by **Olig7475** » Thu Jul 14, 2011 5:18 pm

cheers fella's

D-Rider · #10 Post by **D-Rider** » Thu Jul 14, 2011 5:59 pm

OK ..... sorry I couldn't reply earlier - this is the one forum that I can't get on to at work - so only just seen this ........

OZ did make magnesium wheels for a handful of Milles but these are very rare (just the Nera and the racing SP).
It's not impossible, but I think it very unlikely that you've got yourself a set of them - and you probably wouldn't want them anyway as they degrade and are much less robust than the forged aluminium wheels.
If you do want robust ultra-lightweight wheels then BST carbon fibre jobs are the dogs

I posted up a table of the weights of the various OZ and Aprilia heavy-look-a-likes (as well as the standard Brembo wheels) in this thread:
https://www.ridersite.com/viewtopic.ph ... h&start=15

Olig7475 · #11 Post by **Olig7475** » Thu Jul 14, 2011 6:25 pm

cheers Andy, figured as much.

Nooj · #12 Post by **Nooj** » Thu Jul 14, 2011 9:40 pm

Mags are good for the track, but not so great for the road, less dense molecular structure (why they're lighter) means they don't hold air as well as ally, so your tyre pressure keeps going down.

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