Check the tyre size shown on the driver door jamb placard or in the owner’s handbook first, then compare it with the markings on your current tyres. Some SUVs use different front and rear sizes, so confirm whether you need a matching pair or a full set. If your vehicle has factory 20-inch wheels, also ensure the recommended rim width and any OE requirements (such as specific markings) match what you are buying.
Match the load index on your existing tyres or the vehicle placard, and do not fit a lower rating. 275/45 R20 is often used on heavier SUVs, so higher load ratings and XL versions are common, especially if you carry passengers regularly or tow. If you are unsure between two options, choosing the correct or higher load rating specified by the manufacturer is the safe route.
Use the speed rating specified by your vehicle manufacturer as your baseline and avoid going below it. This size is frequently paired with higher speed ratings on performance-oriented SUVs, so it is worth checking your current sidewall marking and the placard before ordering. If you mainly drive at typical UK motorway speeds, focus on matching the correct rating rather than upgrading, unless your handbook explicitly allows alternatives.
Summer tyres suit most UK conditions when temperatures are regularly above 7C, offering confident wet and dry performance. Winter tyres are the better choice if you face frequent cold weather, snow or icy roads, particularly in hilly or rural areas. All-season tyres can be a practical year-round option if you want one set that handles mixed conditions, as long as you pick a model with the right load and speed ratings for your SUV.
It is best to fit the same tyre model across an axle for predictable handling and braking, especially on heavier SUVs. Mixing brands or patterns can be more noticeable in this size because many vehicles using 275/45 R20 have higher kerb weights and may be AWD, where matched rolling characteristics matter. If you need to replace just one tyre, aim to match the same model and similar tread depth, or replace the pair to keep the axle consistent.
