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645 Posts
If given the option or means, I'd go for the cast iron over SS every time. Ductile iron would be better but more $$$.
As mentioned, they do tent to rust up a bit but that's easily rectified - just ride the bike slowly with the brakes engaged for a short bit and the brake pads will wipe off the surface rust on the cast iron rotors.
You should use specific organic pads to get the most benefit but these days most sintered pads seem to work fine (and the old adage that sintered pads wear out iron rotors - while true - are not as much of a concern these days).
FWIW, I have 2 set of rims and 1 set of rotors.
As mentioned, they do tent to rust up a bit but that's easily rectified - just ride the bike slowly with the brakes engaged for a short bit and the brake pads will wipe off the surface rust on the cast iron rotors.
You should use specific organic pads to get the most benefit but these days most sintered pads seem to work fine (and the old adage that sintered pads wear out iron rotors - while true - are not as much of a concern these days).
FWIW, I have 2 set of rims and 1 set of rotors.
