2026 BMW X3 — 30 xDrive
The 2026 BMW X3 30 xDrive shipped with 5 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
245/50R19
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (122.5 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~28.6" |
| Revolutions per mile | ~704 |
Compare prices at:
255/45R20 (Front)
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (114.8 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~29" |
| Revolutions per mile | ~695 |
Compare prices at:
285/40R20 (Rear)
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (114 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~29" |
| Revolutions per mile | ~696 |
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255/40R21 (Front)
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (102 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~29" |
| Revolutions per mile | ~695 |
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285/35R21 (Rear)
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (99.8 mm) |
| Rim diameter | 21" |
| Overall tire diameter | ~28.9" |
| Revolutions per mile | ~699 |
Compare prices at:
What this size means for your BMW X3
On the 2026 BMW X3 30 xDrive, the factory 245/50R19 measures about 28.6″ in overall diameter with a 122.5 mm (4.8″) sidewall, and completes roughly 704 revolutions per mile. Its 50-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 245/50R19 and 255/45R20 differ in both width and overall diameter (0.4″, 1.4%), which usually means a staggered front/rear setup — the two sizes are not interchangeable side to side, so match each to its correct axle.
Other 2026 BMW X3 trims
- M50 255/45R20 (Front) / 285/40R20 (Rear) / 255/40R21 (Front) / 285/35R21 (Rear)
BMW X3 tire sizes by year
- 2025 BMW X3 245/50R19 / 255/45R20 (Front) / 285/40R20 (Rear) / 255/40R21 (Front) / 285/35R21 (Rear)
- 2024 BMW X3 255/45R20 (Front) / 265/45R20 (Rear) / 255/40R21 (Front) / 265/40R21 (Rear)
- 2023 BMW X3 255/45R20 (Front) / 265/45R20 (Rear) / 255/40R21 (Front) / 265/40R21 (Rear)
- 2022 BMW X3 255/45R20 (Front) / 265/45R20 (Rear) / 255/40R21 (Front) / 265/40R21 (Rear)
- 2021 BMW X3 255/45R20 (Front) / 265/45R20 (Rear) / 255/40R21 (Front) / 265/40R21 (Rear)
- 2020 BMW X3 255/45R20 (Front) / 265/45R20 (Rear) / 255/40R21 (Front) / 265/40R21 (Rear)
- 2019 BMW X3 245/50R19 / 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2018 BMW X3 245/50R19 / 245/45R20 (Front) / 275/40R20 (Rear) / 245/40R21 (Front) / 275/35R21 (Rear)
- 2017 BMW X3 245/50R18 / 245/45R19
- 2016 BMW X3 245/50R18 / 245/45R19
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.