saw this on bike radar ...
Gallery: Taiwanese companies flex their component manufacturing muscle Review - BikeRadar
recall reading that the sand pits left enough grit in the holes in the edge of the discs
that pads wouldn't even last an hour, in the worlds .
sponsors scrambled with an overnight rush to get discs without holes ..
now the regular folks can get them ..
"recall reading" -- appropriate for a CX disc thread....
Those are interesting. Is there any reason not to have solid rotors when overheating isn't a concern? Is it just weight?