If wet braking matters most
Graded A for wet grip, and nothing else that fits is graded higher. Graded C for rolling resistance. EPREL registration 676712.

The BMW iX2 leaves the factory on 205/65 R17 and 225/55 R18 and 245/40 R20 and 245/45 R19 depending on wheel size, and the 205/65 R17 100Y XL below is the one most owners are replacing. XL is not optional here; it is what the car was type approved on. The BMW iX1 takes the same size.
| Generation | Trim | Wheel | Tyre size | Load index | Speed | Construction | Marking | Pressure |
|---|---|---|---|---|---|---|---|---|
| Current | eDrive20 and xDrive30 (17in) | 17in | 205/65 R17 | 100 | Y | XL | none | see plate |
| Current | 18in wheels | 18in | 225/55 R18 | 102 | Y | XL | none | see plate |
| Current | 19in wheels | 19in | 245/45 R19 | 102 | Y | XL | none | see plate |
| Current | 20in wheels | 20in | 245/40 R20 | 99 | Y | XL | none | see plate |
Your own placard is the authority. You will find it on the on the driver's door jamb, on the B-pillar. Where it disagrees with this page, it wins. Match or exceed the size, load index, speed rating and construction class it gives, and use its pressure figure rather than anything printed on the tyre.
All four sizes are square, so tyres can be moved front to rear at any service. BMW's own data puts both the eDrive20 and the xDrive30 on 205/65 R17 100Y XL as the base fitment.
The xDrive30 has a 1,435 kg permitted rear axle load. Two 20in 245/40 R20 99Y tyres carry 1,550 kg, the narrowest margin of the four sizes at 115 kg.
Michelin's UK data also lists a 245/35 R21 96Y for the iX2. That pair would carry only 1,420 kg, below the xDrive30's rear axle limit, so it is not given here until a load index is confirmed from BMW.
How these were chosen. Everything here already clears this vehicle's own load index, speed rating and construction class. Each heading is a question about use rather than a ranking. The whole method.
Graded A for wet grip, and nothing else that fits is graded higher. Graded C for rolling resistance. EPREL registration 676712.
Graded A for rolling resistance, the best of anything here, and that is the figure that shows on the range display. Graded B for wet grip. EPREL registration 2584460.
Measured at 69 decibels, the quietest of the set. Graded A for wet grip, and nothing else that fits is graded higher. EPREL registration 2650388.
A winter tyre, so a second set rather than a replacement for what is on the car now. Graded D for wet grip. Graded B for rolling resistance. EPREL registration 727667.
Rated below the speed this vehicle left the factory at, which is permitted for a winter tyre and is why it carries a T or an R. The load index and the construction class still match. Do not exceed the tyre's own rating while it is fitted.
Ordering is by the registered label figure, not by anything we think of them.
A high performance summer tyre available in the Y rated sizes that heavy, fast electric cars are specified with.
An all-season tyre for electric cars, which is a sensible default in a climate that rarely makes a full winter tyre worth the second set of wheels.
A studless winter tyre built for the weight and the rolling resistance demands of an electric car.
Rated below the speed this vehicle left the factory at, which is permitted for a winter tyre and is why it carries a T or an R. The load index and the construction class still match. Do not exceed the tyre's own rating while it is fitted.
A Korean-built summer tyre that turns up as original equipment more often than its profile suggests, graded A for fuel efficiency.
A touring summer tyre built with Bridgestone's Enliten construction, which cuts weight and rolling resistance across the range rather than in one model.
Including the manufacturer's own published figure. Neither source is standing next to your vehicle, which is why the placard still wins.