Originally Posted by RayJ
I'm not sure how long that fiberglass disc would last if your on the brakes alot. Fiberglass is not fracture or wear resistant. Even with the square edged brake pulley contact points with the discs, I'm sure that it would get pretty sloppy after afew race weekends. Just my .02!!
my x1cr pro buggy has these types of brake disks, it seems to hold up well. remember with the mugen the disk is held on by pins through the disk so there is less contact on a "hub" type system hence less wear.