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wheel question
Posted: Tue Mar 08, 2011 8:57 am
by almondgreen
I can get this wheels:
They are descriped as magnesium wheels.
What do You think ?
Is it possible they are ?
Re: wheel question
Posted: Tue Mar 08, 2011 8:58 am
by mk1
Can't say for certain, but they look pretty good to me.
Re: wheel question
Posted: Tue Mar 08, 2011 9:10 am
by steve1071
As soon as you pick one up you'll know if it's magnesium as they are much lighter.
Nice wheels.
Re: wheel question
Posted: Tue Mar 08, 2011 9:35 am
by guru_1071
steve1071 wrote:As soon as you pick one up you'll know if it's magnesium as they are much lighter.
not always true, the 1960's magnesium wheel Mark has is heavier then both a modern 6x10 genuine minilight and the k&n minator type!
Re: wheel question
Posted: Tue Mar 08, 2011 9:38 am
by Vegard
When did Minilite shift their mag production to Norway?
Re: wheel question
Posted: Tue Mar 08, 2011 9:48 am
by mk1
A 6" Mag minilite weighs around 2.8kg.
Re: wheel question
Posted: Tue Mar 08, 2011 11:06 am
by steve1071
The ones I had were probably so light as they had rotted away!
Re: wheel question
Posted: Tue Mar 08, 2011 8:01 pm
by nick rogers
Genuine magnesium wheels will be siginificantly lighter than equivalent aluminium ones. The density of Al is 2.7 gms/cc and of Mg is 1.74 gms/cc.
Magnesium corrodes much faster than aluminium because it is more reactive and does not form nice stable oxide films. Magnesium is actually used to preferentially corrode when in contact with iron (or steel), so on Minis it will corrode badly around the wheel studs for example.
Hope this helps.
Re: wheel question
Posted: Tue Mar 08, 2011 9:20 pm
by JanWulf
What does Minilite say? Are theynot able to ID the wheels with the number on the back...?
Re: wheel question
Posted: Wed Mar 09, 2011 7:33 am
by mk1
Genuine magnesium wheels will be siginificantly lighter than equivalent aluminium ones. The density of Al is 2.7 gms/cc and of Mg is 1.74 gms/cc.
Magnesium corrodes much faster than aluminium because it is more reactive and does not form nice stable oxide films. Magnesium is actually used to preferentially corrode when in contact with iron (or steel), so on Minis it will corrode badly around the wheel studs for example.
Sounds like a metallurgist talking to Me
You see.all those years at Uni were worth it in the end
Re: wheel question
Posted: Wed Mar 09, 2011 5:20 pm
by nick rogers
Nice one Mark. Yes, I spent all those years preparing for the time when i ran my own mini parts shop.