2 results for your BMW (F15) X5 2014
M (4.4 V8 575) 285/35 R 21 105Y - 325/30 R 21 108Y You can mount non-OE marked tyres on your vehicle, but you should change all 4 tyres at the same time
All 4 tyres should be changed at the same time on 4x4 vehicles