The rotors were done to match the wheels, as standard rotors did not fit. Most wheels will not give you this problem, but mine were made incorrectly. Very long story.........

So I needed custom rotors made. Might as well have some that look good. As for performance advantage, this kind of rotors will assist heat dissipation on the track, but on the road you would not be riding hard enough to notice.

As for wheel strength, magnesium wheels are not suited to rough roads, so I kept away from them. We have lots of rough roads in Australia. But normal alloy wheels are fine. I have not heard of a wheel failure here due to road surface, and plenty of bikes have lightweight alloy wheels as standard. Aprilia use wheels made by an aftermarket manufacturer ( I think Marchesini or Brembo) on their bikes for example.

 

Forged aluminium wheels (which many aftermarkets are) are infact a good deal stronger per weight making them just as robust as the stock one's but ligther...

Magnesium and Carbonfiber wheels are for track only or sunday driving, since they are more brittle...

But like mentioned before, there are other OEM one's that can be made to fit at bargain price's, that are substantially lighter...