BMW M340i tire size
Original tire sizes for the BMW M340i, model years 2020, 2021, 2022, 2023 and 2024. Trim levels and wheel packages change the size within the same year, so confirm on the door-jamb sticker before ordering.
Check before you order. The surest answer is the tires on the car right now: the size is molded into the sidewall. The placard inside the driver's door tells you what the factory fitted, which can differ from what a previous owner put on. Our guide on reading a tire size shows exactly where to look.
Buy tires for your BMW M340i
2020-2024, 18 in
Front axle
Rear axle
All four corners: $824.12 for 2 front + 2 rear, before mounting.
2020-2024, 19 in
Front axle
Rear axle
All four corners: $897.92 for 2 front + 2 rear, before mounting.
Each button opens our mid-range pick in that size at SimpleTire, at the price shown: a known brand with solid wet grip and a long tread warranty. The size page has budget and premium picks too. Prices exclude mounting. Check the sticker inside the driver’s door before you order.
Size by year and trim
| Model years | Trim or package | Tire size | From, per tire | |
|---|---|---|---|---|
| 2020-2024 | 18 in front | 225/45R18 | $73 | Prices |
| 2020-2024 | 19 in front | 225/40R19 | $82 | Prices |
| 2020-2024 | 19 in rear | 255/35R19 | $97 | Prices |
| 2020-2024 | 18 in rear | 255/40R18 | $83 | Prices |
Tire size by model year
| Model year | Tire size | Trim or package | From, per tire | |
|---|---|---|---|---|
| 2024 BMW M340i | 225/45R18, 225/40R19, 255/35R19, 255/40R18 | 18 in front, 19 in front, 19 in rear or 18 in rear | $73 | Prices |
| 2023 BMW M340i | 225/45R18, 225/40R19, 255/35R19, 255/40R18 | 18 in front, 19 in front, 19 in rear or 18 in rear | $73 | Prices |
| 2022 BMW M340i | 225/45R18, 225/40R19, 255/35R19, 255/40R18 | 18 in front, 19 in front, 19 in rear or 18 in rear | $73 | Prices |
| 2021 BMW M340i | 225/45R18, 225/40R19, 255/35R19, 255/40R18 | 18 in front, 19 in front, 19 in rear or 18 in rear | $73 | Prices |
| 2020 BMW M340i | 225/45R18, 225/40R19, 255/35R19, 255/40R18 | 18 in front, 19 in front, 19 in rear or 18 in rear | $73 | Prices |
What BMW approves
BMW-approved tires carry a star on the sidewall.
The star means BMW signed off on that exact tire for that car. Many BMWs also leave the factory on run-flats, marked RSC or with the maker's own code such as ZP or MOE, and BMW's own advice is not to mix run-flat and standard tires on the same car.
Brands that carry the approval
Written on the sidewall as: Pirelli P Zero (★), Continental PremiumContact 6 (★).
The drawing carries the sizes we list for this car, so you know what you are looking for. The placard on the car is still the final word, and it is the only place that gives the cold pressures: the number molded into the sidewall is the maximum the tire can hold, not what your car wants.
What those tires cost
Buying wheels at the same time?
A staggered car is the one case where new wheels and new tires usually happen together, because a bent or corroded rear rim is what sends most people shopping in the first place. Four numbers have to match before the size does any good.
- Bolt pattern
- Number of studs and the circle they sit on, written as 5x114.3. It is not adjustable; adapters are a compromise.
- Offset
- How far the mounting face sits from the centre line. Wrong offset rubs the strut or the fender, even in the right size.
- Centre bore
- The hole in the middle must sit on the hub, not on the bolts. A hub-centric ring fills a bore that is too large.
- Load rating
- Each wheel must carry its share of the loaded car. This is what gets missed on trucks and on anything towing.
Wheels and complete wheel and tire packages, mounted and balanced.
BMW M340i tires: common questions
What size tires does a BMW M340i take?
The most common original size is 225/45R18. Other model years and trims use different sizes, so check the list on this page and confirm against the sticker inside your driver's door.
Can I fit a different size on my BMW M340i?
You can, within limits: the overall diameter should stay within about 3 percent of the original, and the load index and speed rating must meet or exceed the door placard. Anything further changes your speedometer reading and can rub at full lock.
Where is the tire size on a BMW M340i?
Open the driver's door and look at the white and yellow placard on the door jamb or the B-pillar. The same size is also molded into the sidewall of the tires currently on the car, unless someone changed them.
What size tires does a 2024 BMW M340i take?
The 2024 BMW M340i came from the factory on 225/45R18 and 225/40R19 and 255/35R19 and 255/40R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2023 BMW M340i take?
The 2023 BMW M340i came from the factory on 225/45R18 and 225/40R19 and 255/35R19 and 255/40R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.
What size tires does a 2022 BMW M340i take?
The 2022 BMW M340i came from the factory on 225/45R18 and 225/40R19 and 255/35R19 and 255/40R18. Wheel packages can change that within the same model year, so check the placard inside the door jamb before you order.