2015 BMW 328d — xDrive Wagon M Sport Brakes
The 2015 BMW 328d xDrive Wagon M Sport Brakes came from the factory equipped with 225/45R18 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
225/45R18
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (101.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~26" |
| Revolutions per mile | ~777 |
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What this size means for your BMW 328d
On the 2015 BMW 328d xDrive Wagon M Sport Brakes, the factory 225/45R18 measures about 26″ in overall diameter with a 101.3 mm (4″) sidewall, and completes roughly 777 revolutions per mile. Its 45-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a passenger (P-metric / Euro-metric) size.
Other 2015 BMW 328d trims
- Sedan Base Model 225/50R17
- Sedan Luxury Line 225/45R18
- Sedan M Sport 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- Sedan M Sport Brakes 225/45R18
- Sedan Sport Line 225/45R18
- xDrive Sedan Base Model 225/50R17
- xDrive Sedan Luxury Line 225/45R18
- xDrive Sedan M Sport 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- xDrive Sedan M Sport Brakes 225/45R18
- xDrive Sedan Sport Line 225/45R18
- xDrive Wagon Base Model 225/50R17
- xDrive Wagon Luxury Line 225/45R18
- xDrive Wagon M Sport 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- xDrive Wagon Sport Line 225/45R18
BMW 328d tire sizes by year
- 2018 BMW 328d 225/50R17 / 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- 2017 BMW 328d 225/50R17 / 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- 2016 BMW 328d 225/50R17 / 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- 2014 BMW 328d 225/50R17
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.