Honda City 1.3 original tyres are 175/65-15, as far as I can remember. Since you are in Karachi and mostly driving in heavy traffic at low speeds, it's probably better to for original size. That should improve mileage.
After reading this thread im confused Either Advan DB tyres are good or bad for City. Mixed comments found here
I have toyo nano energy 3...going good for 30000 km...
sallam o alikum ghalat hai ,,,,is ka matlab tum par mout ho ....asal lafz asslama e lecum ...tum par salamti ho
If you are looking for comfort than Contenetal cc6 and if you are looking for longevity than dunlop eco
its 185s???. . .how much fuel economy u getting?. . .share mileage?KK
Just got a quote of 10k per tire for cc6. Should i go ahead?
Btw this doesn't look like cc6. It has diamond pattern
Yes, 185/65 15. Run for 30k km+ and fuel average remained around 10 for my 1.5 pros City pre-COVID. Not very good but acceptable. Not different from the advan dB v551 I had before this.
This is CC6 if you look closely at the tire markings. The ādiamondā pattern is not visible from this angle as it is on the inner side.