ok, i'm about to pull the trigger on some 160mm bb7's for my 07 specialized hardrock sport. i got a set of the stock HR sport Disk wheels for free, and i'm itching to get some disk brakes. i am just doing urban/ stairs/ street stuff right now, but this summer i will be doing mostly XC with some slight downhill sections.
1) i have heard bad things about mixing disks and quick releases, what's up here? i may want to go 185 on the front eventually, will this cause problems?
2) do i really need the disk on the back? right now i'm looking at just putting a disk on the front and leaving the back alone, since i never use it and when i do, it will lock the back wheel easily. maybe just "in case?"
3) any other negatives about the BB7's in general? do i NEED to replace the stock roundagon rotors? i have read that they fade/ overheat quickly?