2025 BMW M4 — Competition Coupe
The 2025 BMW M4 Competition Coupe shipped with 4 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.
275/40R18 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 40% (110 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~26.7" |
| Revolutions per mile | ~756 |
Compare prices at:
285/35R19 (Rear)
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (99.8 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~26.9" |
| Revolutions per mile | ~751 |
Compare prices at:
275/35R19 (Front)
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 35% (96.3 mm) |
| Rim diameter | 19" |
| Overall tire diameter | ~26.6" |
| Revolutions per mile | ~759 |
Compare prices at:
285/30R20 (Rear)
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 30% (85.5 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~26.7" |
| Revolutions per mile | ~754 |
Compare prices at:
What this size means for your BMW M4
On the 2025 BMW M4 Competition Coupe, the factory 275/40R18 measures about 26.7″ in overall diameter with a 110 mm (4.3″) sidewall, and completes roughly 756 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.
This is a staggered setup: the front axle runs 275/40R18 and the rear runs 285/35R19. The two sizes are not interchangeable, so order each for its correct axle and don't rotate front-to-rear.
Other 2025 BMW M4 trims
- Coupe 275/40R18 (Front) / 285/35R19 (Rear) / 275/35R19 (Front) / 285/30R20 (Rear)
- CS 275/35R19 (Front) / 285/30R20 (Rear)
- CSL 275/35R19 (Front) / 285/30R20 (Rear)
- M Carbon Ceramic Brakes 275/35R19 (Front) / 285/30R20 (Rear)
- xDrive Competition Convertible 275/35R19 (Front) / 285/30R20 (Rear)
- xDrive Competition Coupe 275/35R19 (Front) / 285/30R20 (Rear)
BMW M4 tire sizes by year
- 2026 BMW M4 275/35R19 (Front) / 285/30R20 (Rear)
- 2024 BMW M4 275/40R18 (Front) / 285/35R19 (Rear) / 275/35R19 (Front) / 285/30R20 (Rear)
- 2023 BMW M4 275/40R18 (Front) / 285/35R19 (Rear) / 275/35R19 (Front) / 285/30R20 (Rear)
- 2022 BMW M4 275/40R18 (Front) / 285/35R19 (Rear) / 275/35R19 (Front) / 285/30R20 (Rear)
- 2021 BMW M4 275/40R18 (Front) / 285/35R19 (Rear) / 275/35R19 (Front) / 285/30R20 (Rear)
- 2020 BMW M4 255/40R18 (Front) / 275/40R18 (Rear) / 255/35R19 (Front) / 275/35R19 (Rear)
- 2019 BMW M4 255/40R18 (Front) / 275/40R18 (Rear) / 255/35R19 (Front) / 275/35R19 (Rear)
- 2018 BMW M4 255/40R18 (Front) / 275/40R18 (Rear) / 255/35R19 (Front) / 275/35R19 (Rear)
- 2017 BMW M4 255/40R18 (Front) / 275/40R18 (Rear) / 255/35R19 (Front) / 275/35R19 (Rear)
- 2016 BMW M4 255/35R19 (Front) / 275/35R19 (Rear)
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.