285/35 R23 means a 285 mm wide tyre, with a 35% profile (sidewall height), built in radial construction for a 23 inch wheel. It is a low-profile fitment, so you can expect more direct steering feel but a firmer ride than taller profiles. Because the sidewall is shorter, it is also more sensitive to potholes and kerb impacts, so it is worth choosing a tyre known for strong rim protection and checking your wheel and suspension condition.
Most 285/35 R23 listings are XL (extra load) and commonly sit around load index 107-111, with speed ratings often W or Y. The correct choice depends on your vehicle, so match the load index and speed rating shown on the door jamb placard or handbook, or exceed them if needed. Avoid dropping below the specified ratings, as that can affect safety, handling and insurance validity.
All-season options do exist in 285/35 R23, but the range is usually smaller than in more common 21-22 inch sizes, and full winter choices can be limited. If you drive year-round and want one set, prioritise all-season tyres with the 3PMSF marking for cold-weather performance. If you regularly face snow or very low temperatures, a dedicated winter wheel and tyre package in an alternative approved size may offer far more choice.
Changing from 285/35 R23 to 285/40 R23 or 295/35 R23 alters the rolling radius, width and clearance, which can affect speedometer accuracy, suspension and arch clearance, and how the tyre seats on the wheel. Some changes may be possible, but only if the alternative size is an approved fitment for your specific model and wheel width. Before ordering, confirm the approved sizes in your handbook or with the vehicle manufacturer, and check with your insurer if you plan to deviate from the original specification.
In many cases, yes - 285/35 R23 is frequently used on heavier SUVs, and XL versions are common to support higher axle loads with better stability. If your vehicle specifies XL (or an equivalent reinforced marking), you should stick to it. If you are considering run-flat options in 285/35 R23, only choose them if your vehicle is set up for run-flats and you plan to keep the same type across an axle for consistent handling.