2016 BMW 320i — Sedan Base Model
The 2016 BMW 320i Sedan Base Model came from the factory equipped with 225/50R17 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.
225/50R17
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (112.5 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~25.9" |
| Revolutions per mile | ~780 |
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What this size means for your BMW 320i
On the 2016 BMW 320i Sedan Base Model, the factory 225/50R17 measures about 25.9″ in overall diameter with a 112.5 mm (4.4″) sidewall, and completes roughly 780 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.
Other 2016 BMW 320i trims
- Sedan Sport Package 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- Sedan Track Handling Package 225/45R18 (Front) / 255/40R18 (Rear)
- xDrive Sedan Base Model 225/50R17
- xDrive Sedan Sport Package 225/45R18 / 225/45R18 (Front) / 255/40R18 (Rear)
- xDrive Sedan Track Handling Package 225/45R18 (Front) / 255/40R18 (Rear)
BMW 320i tire sizes by year
- 2018 BMW 320i 225/50R17 / 225/45R18
- 2017 BMW 320i 225/50R17
- 2015 BMW 320i 225/50R17
- 2014 BMW 320i 225/50R17
- 2013 BMW 320i 225/50R17
- 1983 BMW 320i 185/70R13
- 1982 BMW 320i 185/70R13
- 1981 BMW 320i 185/70R13
- 1980 BMW 320i 185/70R13
- 1979 BMW 320i 185/70R13
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.