Pesh bro... I suppose you've visited Shahid Auto in F10?
2-3 shops to the left, same line, ask for "Haroon tyre waala", in fact ask Mohsin at Shahid Autos and he'll guide you there in a minute.
Give Haroon my reference as his customer from "Wah Cantt", or let Mohsin introduce you to him.
Haroon is a young, sharp chap, does fair dealings, but you've to ward of "young blood business sense", with your own understanding of affairs... Samaj to gaye ho ge 
Now tyres would be available all around, but I personally always avert the Pindi route and prefer easy surroundings like in F10...
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