2014 BMW 528i — Sedan Luxury Line
The 2014 BMW 528i Sedan Luxury Line came from the factory equipped with 245/45R18 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.
245/45R18
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (110.3 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~26.7" |
| Revolutions per mile | ~756 |
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What this size means for your BMW 528i
On the 2014 BMW 528i Sedan Luxury Line, the factory 245/45R18 measures about 26.7″ in overall diameter with a 110.3 mm (4.3″) sidewall, and completes roughly 756 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 2014 BMW 528i trims
- Sedan Base Model 225/55R17
- Sedan M Sport 245/45R18 / 245/45R18 (Front) / 275/40R18 (Rear)
- Sedan Modern Line 245/45R18
- xDrive Base Model 225/55R17
- xDrive Luxury Line 245/45R18
- xDrive M Sport 245/45R18 / 245/45R18 (Front) / 275/40R18 (Rear)
- xDrive Modern Line 245/45R18
BMW 528i tire sizes by year
- 2016 BMW 528i 225/55R17 / 245/45R18
- 2015 BMW 528i 225/55R17
- 2013 BMW 528i 225/55R17
- 2012 BMW 528i 225/55R17
- 2011 BMW 528i 225/55R17
- 2010 BMW 528i 225/50R17 / 245/40R18
- 2009 BMW 528i 225/50R17 / 245/40R18
- 2008 BMW 528i 225/50R17 / 245/40R18
- 2000 BMW 528i 225/60R15 / 225/55R16
- 1999 BMW 528i 225/60R15 / 225/55R16
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.