2016 BMW 228i — Coupe M Sport
The 2016 BMW 228i Coupe M Sport shipped with 3 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.
225/40R18
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (90 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.1" |
| Revolutions per mile | ~804 |
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225/40R18 (Front)
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (90 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~25.1" |
| Revolutions per mile | ~804 |
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245/35R18 (Rear)
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (85.8 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~24.8" |
| Revolutions per mile | ~815 |
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What this size means for your BMW 228i
On the 2016 BMW 228i Coupe M Sport, the factory 225/40R18 measures about 25.1″ in overall diameter with a 90 mm (3.5″) sidewall, and completes roughly 804 revolutions per mile. Its 40-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.
The 225/40R18 and 225/40R18 roll within 0″ (0%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
Other 2016 BMW 228i trims
- Convertible Base Model 205/50R17 / 225/40R18
- Convertible Luxury Package 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- Convertible M Sport 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- Coupe Base Model 205/50R17 / 225/40R18
- Coupe Luxury Package 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- xDrive Convertible Base Model 205/50R17 / 225/40R18
- xDrive Convertible Luxury Package 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- xDrive Convertible M Sport 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- xDrive Coupe Base Model 205/50R17 / 225/40R18
- xDrive Coupe Luxury Package 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
- xDrive Coupe M Sport 225/40R18 / 225/40R18 (Front) / 245/35R18 (Rear)
BMW 228i tire sizes by year
- 2024 BMW 228i 225/45R17 / 225/40R18 / 235/35R19
- 2023 BMW 228i 225/45R17 / 225/40R18 / 235/35R19
- 2022 BMW 228i 225/45R17 / 225/40R18 / 235/35R19
- 2021 BMW 228i 225/40R18 / 235/35R19
- 2020 BMW 228i 225/40R18 / 235/35R19
- 2015 BMW 228i 205/50R17 / 225/40R18
- 2014 BMW 228i 205/50R17 / 225/40R18
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.