Check the tyre placard in the door shut, your handbook, and the size printed on your current tyre sidewall. Confirm the 235 width, 35 profile and 19-inch rim diameter match, and only change size if your vehicle manufacturer approves it.
Many tyres in this size are offered with ratings such as 91Y or 91W, often marked XL. Always choose a load index and speed rating that meets or exceeds what your car specifies on the placard or in the handbook.
If your original fitment is marked XL (Extra Load), stick with XL because the construction is designed to carry the required load at the correct pressures. If XL is not specified, you can choose standard load, but the load index must still be equal to or higher than your current tyres.
Only switch to run-flats if your vehicle and wheels are compatible and you have a working TPMS or another approved puncture solution. Avoid mixing run-flat and non run-flat on the same axle because the different sidewall stiffness can affect steering feel and stability.
Summer tyres are best for warm-weather grip and sharper handling, while winter tyres are designed for cold temperatures and wintry conditions. For year-round use, all-season tyres with the 3PMSF symbol are a strong option for cold, wet roads and occasional snow, while still working well through milder months.