I can comment on the VO ones as well: they don't like vibrations. My rear broke straight across under the brake bridge, but I have to take some of the blame for that having done a sloppy job drilling that hole. Having repaired that however, they have now started to split lengthwise along the "hammered" honeycomb pattern. They are difficult to keep in place, and move up and down alot going over bumps and cobblestones. This all pertains to the rear actually, the front has been pretty nice to me.
I can comment on the VO ones as well: they don't like vibrations. My rear broke straight across under the brake bridge, but I have to take some of the blame for that having done a sloppy job drilling that hole. Having repaired that however, they have now started to split lengthwise along the "hammered" honeycomb pattern. They are difficult to keep in place, and move up and down alot going over bumps and cobblestones. This all pertains to the rear actually, the front has been pretty nice to me.