I was told that putting 20 inch wheels on a Gallardo will shorten the life of the clutch. Assuming that lower profile tires are used to maintain the same overall tire circumference, I can't seem to figure out why the clutch would be effected. Is this true? Are there any other problems with running 20s?

I for one do not put aftermarket wheels on a performance car. After all they spent a crap load of money to get them right...I know of NO after market wheel that will stand up to the rating of the factory tire.

As a matter of fact LAMBORGHINI does void your warranty for replacing OEM wheels with after market ones.

I knw it can cause issues with overheating of the VT drive, which in turn cause it to be defective at some point, NOT if but WHEN...

I do not know about the clutch, other than maybe the additional weight of aftermarket wheels to get them turning and started rolling??

IMO stay with FACTORY correct wheels.

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It's not the clutch. It's the all wheel drive system as Roy indicated. I believe it has to do with the proportional rotation of the front to rear wheels which is affected by the possible different overall circumference of aftermarket wheels. However, you're right. If you maintain the same (or very close) proportional circumference front to back it should have no affect on the system. Whether the wheels are turning faster or slower is secondary to whether they are turning in the correct (close to or at the factory) proportion to one another. Sorry for making it sound more complex than it is.