Does anyone have any clue if XL rated tyre rubber last longer without hardening, dry rotting as it ages? I heard they have stiffer sidewalls, so maybe it would have some effect to that. Because i have a car in family that isn't going to be driven much, but i want the tyres to last. My heart would ache if i had to throw out tyres with more than 80% tread left. Btw would you advise on buying XL tyres for a volvo v70(2010) 2.4d that has curb weight of 1800kg, there is some potholes here too. Thank you
