Sir
You are using snow tires which are meant to be used on snow, and it is very unlikely to snow in Karachi.
There are several tyre Categories like :
<table width="760" border="0" cellpadding="0" cellspacing="0"><tbody><tr><td colspan="2">
</td> </tr> <tr valign="top"> <td width="380"> Extreme Performance Summer
Max Performance Summer
Ultra High Performance Summer
Ultra High Performance All-Season
High Performance All-Season
High Performance Summer
</td> <td width="380">
Grand Touring Summer
Grand Touring All-Season
Standard Touring All-Season
Passenger All-Season
Studless Ice and Snow
Performance Winter
</td></tr></tbody></table>
Copied from a website.
Ideally you should use performance tyres or passenger tyres or GT tyres for Karachi.
Get a Michelin Energy XM1+ 155/65 R13 or a bridgestone Potenza GIII in same size or lower aspect ratio.
Tyres are the lifeline of a car, it can sometimes become decisive to your life (God forbids).
I have Imported Alloys and Pirelli P6000 in my Civic and I know that my Civic reaches those limits where any Civic or Corolla with stock General's can easily do a 180 degree skid.
Day and Night difference.
Regards