Artash Tyres in Faisal Town gives really good deals.
Visit Defence too.
Else Neela Gumbad has variety as well.
In 16, you'll mostly find Nitto, Falken and Dunlop.
Go for NONE of these. Try to find some nice Michellin [NOT ENERGY] or Yokohama (Db Decible or S Drives)
In Dunlop they'll convince you to buy A Drive, Eco and Sp 9000s. Discard them too, ask for Dunlop LM702s.