2021 BMW X5 M50i (21")
The 2021 BMW X5 M50i (21") tire size and wheel specifications below reflect standard OEM reference fitment data for this trim level.
Detailed tire and wheel breakdown for the 2021 BMW X5
Tire geometry â 275/40R21
The 275/40R21 fitted to the 2021 BMW X5 has a section width of 275mm and an aspect ratio of 40%, mounted on a 21-inch rim. That gives a sidewall height of 110.0mm (4.33") and an overall outside diameter of 753.4mm (29.66"). At highway speed this tire completes roughly 422 revolutions per kilometre, which is what your speedometer and odometer are calibrated against.
Plus-sizing window
If you want to upsize wheels on the 2021 BMW X5 while keeping the speedometer accurate, target a 285/34R22 (plus-one). For a softer ride or winter setup, a 265/46R20 (minus-one) keeps the overall diameter within Âą3% of stock, which is the industry tolerance for ABS and stability control to stay calibrated.
Wheel fitment specs
The 2021 BMW X5 uses a 5x112 bolt pattern with a 66.6mm hub bore. Safe rim width range for the OEM tire is 9.0J â 10.0J, and offsets in the ET32 â ET42 window will clear suspension and fender without rubbing on most setups.
Staggered setup notes
The 2021 BMW X5 ships staggered: 275/40R21 up front and 315/35R21 on the rear. That is a 315mm vs 275mm width difference â do not rotate front-to-rear, and replace tires in axle pairs to keep ABS and traction control balanced.
Tire pressure guidance
Manufacturer-recommended cold tire pressure for the 2021 BMW X5 is printed on the driver-side door jamb sticker â always defer to that value, not to the maximum pressure printed on the tire sidewall. Check pressure monthly and before long trips; under-inflation by 20% can reduce tread life by 25%.
Fitment Specifications
| Engine & Trim | Tire Size | Rim Size | Offset (ET) |
|---|---|---|---|
| M50i (21") | 275/40R21 Rear: 315/35R21 | 21" x 9.5 | ET37 |
Frequently Asked Questions
What tire size does the 2021 BMW X5 M50i (21") use?
The 2021 BMW X5 M50i (21") uses 275/40R21 tires as standard equipment.
What is the bolt pattern of the 2021 BMW X5 M50i (21")?
The 2021 BMW X5 M50i (21") has a 5x112 bolt pattern with a center bore of 66.6mm.
What is the wheel offset of the 2021 BMW X5 M50i (21")?
The 2021 BMW X5 M50i (21") has a wheel offset of ETET37.