For 2011-2017 Porsche Cayenne models with factory-fitted 20-inch wheels, the correct and safe tyre sizes are 275/45 R20 for the front axle and 305/40 R20 for the rear axle. This staggered setup is crucial for maintaining the vehicle's handling balance, all-wheel-drive system calibration, and clearance, especially for GCC-spec vehicles often driven on high-speed corridors like the Dubai-Abu Dhabi highway. Using a mismatched size, such as the square 275/45 R20 setup from the 2018 model year, can lead to incorrect speedometer readings and potential drivetrain stress. Based on Porsche's technical specifications and common practice in UAE dealerships, the total cost for a set of four premium tyres (e.g., Michelin or Pirelli) in these sizes typically ranges between AED 4,000 to AED 6,500, depending on the brand and tyre type (summer vs. all-season). Vehicle regulations from the RTA Dubai emphasize that tyre specifications must match the manufacturer's guidelines for the vehicle's registration and passing periodic testing. Furthermore, safety advisories from the MOI UAE consistently cite incorrect tyre size and pressure as a contributing factor in highway incidents, particularly in summer months when temperatures exceed 40°C. Always cross-reference the placard on your driver's side door jamb—it lists the exact sizes for your specific Cayenne's trim and wheel option—or use your VIN with an official Porsche dealer like Ali & Sons or Premier Motors to confirm.
