That "for marta only" is for maugra brakes.
You shouldnt use the marta rotors on lets say a Julie brake.
I believe the 160 mm marta rotors will work on BB7s. Although, I would get the SL drilled rotors instead. They are a tad heavier, but have a wider brake track and cool better. As a bonus, they are cheaper! The Magura rotors are 2.0 mm usually. The avids are like 1.8mm. With BB7, the pad space can be tweaked a bit.
Keep something in mind here. Avid rotors and calipers go 160, 185 203.
Magura go 160, 180, 200.
So, you can use the 160 mm marta rotors, but the other sizes probably will not work.
You shouldnt use the marta rotors on lets say a Julie brake.
I believe the 160 mm marta rotors will work on BB7s. Although, I would get the SL drilled rotors instead. They are a tad heavier, but have a wider brake track and cool better. As a bonus, they are cheaper! The Magura rotors are 2.0 mm usually. The avids are like 1.8mm. With BB7, the pad space can be tweaked a bit.
Keep something in mind here. Avid rotors and calipers go 160, 185 203.
Magura go 160, 180, 200.
So, you can use the 160 mm marta rotors, but the other sizes probably will not work.