need advice about sport rims

[jj.v6]

hi guys..as we know there are currently so many type of rims
1.forged rim
2.light alloy wheels
3.3 piece forged wheel
and so on..
so actually wat r the pros and cons of those rims?is it something like using lighter rims can damage the rims ?light alloy r more stronger than the rest?
noticed most rims got some indication like 500kg,600 kg and so on in the wheels..wat is that means?the weight of the rims!?or the weight it can support??or something else??
thanx in advance

 

[arturo]

i'm no rim expert but if i not mistaken...the indication is the max weight it can support per rim...and of cos lighter is always better....light rims reduce unsprung weight and thus reduces FC and increases 0-100 times.