The best replacement for rotors is pistons.

The best alternatives to rotors are rated as following:
★★★★★  pistons
★★★  drilled rotors
★★★  replace
★★★  drums
★★★  drilled
★★★  discs
★★★  resurface
★★★  brake pads
★★  slotted rotors
★★  replacing
★  regular rotors
★  slotted
★  blank
★  piston
★  aftermarket
★  solid
★  cross drilled
★  brembo
★  pads
  sprays
  standard rotors
  drilled slot rotors
  cross drilled rotors
  spray heads
  turn

Your alternative for rotors is not listed? Suggest!
Speaking about rotors, one probably shouldn't forget about pads.

Other search terms related to rotors and their ratings are:
★★★★★ pads
★★★★★ brake pads
★★ replacing pads
★★ shimano brakes
★★ avid brakes
★ changing pads
★ new pads
★ shimano calipers
★ changing brake pads
★ old pads
ssiii
replacing brake pads
You have in mind a companion for rotors and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of rotors in all years. Click on graph for more.
rotors
pistons
drilled rotors