The best replacement for slicks is drag radials.

The best alternatives to slicks are rated as following:
★★★★★  drag radials
★★  knobby tires
★★  street tires
★★  domino
★★  wets
★  mickey thompson
★  bias ply slicks
★  semi slicks
  hoosier slicks
  radials
  mickey thompson slicks
  knobbies
  dot radials
  r compounds
  slicks
  drag radial

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

Other search terms related to slicks and their ratings are:
★★★★★ radials
You have in mind a companion for slicks and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of slicks in all years. Click on graph for more.
slicks
drag radials
knobby tires