265 is the tyre width in millimetres, 50 is the aspect ratio (sidewall height as a percentage of the width), R means radial construction, and 19 is the wheel diameter in inches. When buying 265/50 R19, also match the load index and speed rating shown on your current tyres or vehicle placard.
Use the exact load index and speed rating specified for your vehicle, as 265/50 R19 is often used on heavier SUVs that need higher load capacity. You can usually find the correct figures on the driver’s door jamb sticker, in the handbook, or on the tyres already fitted - and it is important to match them across each axle.
Many vehicles that run 265/50 R19 require XL (extra load) construction to handle higher weights and passenger loads. If your current tyres include an XL marking, or your vehicle placard specifies reinforced tyres, choose XL again to maintain the intended load capacity and handling.
Run-flat tyres are available in 265/50 R19 from selected manufacturers, but they should only be fitted if your vehicle is designed for them. Check whether your car has run-flat suspension settings, a tyre pressure monitoring system (TPMS), and no spare wheel arrangement before choosing a run-flat replacement.
Changing away from 265/50 R19 can alter rolling circumference, speedometer accuracy, ground clearance, and potentially interfere with stability systems. Only switch sizes if your vehicle manufacturer lists an approved alternative size for your exact model and wheel width, and keep sizes matched across each axle.
