It usually returns the factory-fit tyre sizes for your exact vehicle, but if your Altea XL has different wheels from standard (for example aftermarket alloys), check the tyre size on the sidewall and search by size to confirm.
Look at the tyre sidewall for a code like 205/55 R16. Enter that size, then make sure the load index and speed rating meet or exceed what your vehicle requires.
Yes, it is legal in the UK if the tyres are the correct size and specification, but matching tyres across an axle is recommended for consistent grip and handling, especially in wet conditions.
Replace when tread is low, damaged, or showing uneven wear. The UK legal minimum tread depth is 1.6mm across the central three-quarters of the tyre, but many drivers change earlier for stronger wet braking.
After choosing your tyres, you select a nearby fitting garage and a time slot. The tyres are delivered to that garage for your appointment, and you just arrive on the day (bring your locking wheel nut if your wheels use one).
