I have a 2009 Corolla 2.0D with stock Euro 195/65/15 tyres. Am looking to upgrade to a better tyre, what would you suggest? Budget is 30-35k. I live in Karachi and 99% of my driving is on city roads. Corolla diesel has a heavy ride so I want tyres that will ensure the smoothest possible drive on Karachi's roads but also tough because Karachi's roads are very bad in some areas. I also want something that won't kill my fuel economy, diesel has become expensive enough as it is!