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 iX1 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 iX2 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.
BMW's launch data gives the xDrive30 a 205/65 R17 100Y XL, a tall 133 mm sidewall on a car that can also be ordered on 20in wheels with 98 mm.
Every size is square and XL. The 18 and 19in both carry 850 kg per tyre (index 102); the 20in drops to 775 kg (index 99), which against BMW's 1,415 kg rear axle limit for the xDrive30 still leaves 135 kg for the pair.
It is the electric version of the X1. Michelin's UK data also lists a standard-load 225/55 R18 98V for it; the XL 102Y given here is the 18in size BMW quotes for the X2 built on the same platform.
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.