2015 BMW BMW X3 — sDrive28i Base Model
The 2015 BMW BMW X3 sDrive28i Base Model shipped with 2 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.
245/50R18
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (122.5 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~27.6" |
| Revolutions per mile | ~730 |
- Check 245/50R18 price at TireRack
- Check 245/50R18 price at SimpleTire
- Check 245/50R18 price at Priority Tire
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245/45R19
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (110.3 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~27.7" |
| Revolutions per mile | ~729 |
- Check 245/45R19 price at TireRack
- Check 245/45R19 price at SimpleTire
- Check 245/45R19 price at Priority Tire
Some links on this page are affiliate links — see our disclosure.
Other 2015 BMW BMW X3 trims
- sDrive28i M Sport 245/45R19 / 275/40R19
- sDrive28i xLine 245/45R19
- xDrive28d Base Model 245/50R18 / 245/45R19
- xDrive28d M Sport 245/45R19 / 275/40R19
- xDrive28d xLine 245/45R19
- xDrive28i Base Model 245/50R18 / 245/45R19
- xDrive28i M Sport 245/45R19 / 275/40R19
- xDrive28i xLine 245/45R19
- xDrive35i Base Model 245/50R18 / 245/45R19
- xDrive35i M Sport 245/45R19 / 275/40R19
- xDrive35i xLine 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.