Key takeaways
- The G20 3 Series (2019 on) commonly uses 205/60 R16 or 225/50 R17, and the M340i runs staggered 225/45 R18 front and 255/40 R18 rear, or 225/40 R19 and 255/35 R19.
- The F30 (2012 to 2019) mostly used 205/60 R16 or 225/50 R17, and the Gran Turismo used 225/55 R17.
- Most 3 Series leave the factory on run-flat tyres with no spare; swapping to standard tyres means carrying a kit or a spare.
- Staggered cars cannot rotate tyres front to rear, and the rear tyres on rear-drive cars often wear out first.
The 3 Series is BMW's best-known saloon and one of the most common premium cars in the UK. Tyre choice is more involved than on most family cars, because many have run-flat tyres, some have different sizes front and rear, and the car can be rear-wheel drive or xDrive all-wheel drive. This guide covers the factory sizes for the last two generations and what each set-up means for your next set of tyres.
What is the best tyre for a 3 Series?
The right tyre depends on three things: the size on your placard, whether your car came on run-flats, and whether it is staggered. Once those are settled, a premium or quality mid-range tyre with a strong wet-grip grade and the correct speed rating suits most cars. The M340i and other fast models deserve an ultra-high-performance tyre in the exact staggered sizes.
What size tyres does a BMW 3 Series use?
| 3 Series version | Common factory size |
|---|---|
| F30 and F31, 2012 to 2019, smaller engines | 205/60 R16 92H or 92W |
| F30 and F31 325d, 330d, 330i and similar | 225/50 R17 94W |
| F34 Gran Turismo | 225/55 R17 |
| G20 and G21, 2019 on, 318i, 320i, 318d | 205/60 R16 96W |
| G20 and G21 320d, 320e, 330d | 225/50 R17 98Y |
| G20 M340i on 18s, staggered | 225/45 R18 front, 255/40 R18 rear |
| G20 on 19s, staggered | 225/40 R19 front, 255/35 R19 rear |
M Sport and other trims were often ordered on larger optional wheels, so many four-cylinder cars run staggered 18s or 19s too. Read both the front and rear sidewalls before ordering. For the detail, see our page on reading tyre sizes.
Are you on run-flat tyres?
Most 3 Series leave the factory on run-flat tyres and without a spare wheel. A run-flat has stiffened sidewalls that let you drive a limited distance at reduced speed after a puncture. They are marked on the sidewall, often with RSC for BMW, and the car's tyre pressure system is set up to warn you of a puncture.
Some owners switch to standard tyres for a softer ride. That is legal, but you then need a way to deal with a puncture, such as a sealant kit or a space-saver, because the car has no spare. Our BMW run-flat guide goes into the pros and cons in more detail.
What does staggered mean for a 3 Series?
A staggered 3 Series has wider tyres on the rear than the front. That suits a rear-wheel-drive car, which puts its power down through the back tyres. It also means you cannot rotate the tyres from front to rear, so each axle wears at its own rate. On many rear-drive cars the rears wear out first, especially if the car is driven briskly.
Always buy staggered tyres in the right sizes for each axle, and keep both tyres on an axle the same brand and pattern. Ideally, fit the same model front and rear so the car's handling stays balanced.
Rear-wheel drive or xDrive?
Most 3 Series are rear-wheel drive, which affects how the tyres wear and how the car behaves in the wet. Good rear tyres are essential for stability, so never leave the rears badly worn while replacing the fronts. On xDrive all-wheel-drive cars, all four tyres should have similar tread depth to protect the drive system, so replacing a full set is usually best.
Should you look for the star marking?
BMW approves tyres for its cars with a star symbol on the sidewall. Star-marked tyres are developed for the car's handling, ride and run-flat system. A star-marked tyre is not compulsory, but many owners prefer to keep it, especially on run-flats. Whatever you choose, keep both tyres on an axle identical.
3 Series fitting checks
- Locking wheel bolts: most 3 Series have a locking bolt on each wheel. Keep the key in the car; we can remove locking bolts if it is lost.
- Pressure monitoring: depending on age and spec, the car uses either an indirect system reset through the iDrive menu or sensors inside the wheels, so the fitter should check which before starting.
- Plug-in hybrids: the 320e and 330e are heavier, so match the load index on the placard.
3 Series tyres fitted at home
Run-flats need the right machine and a careful fitter, and that is standard kit on our vans. Read both your front and rear sidewalls, then call 07717 389637 with the sizes; for a staggered car we bring two pairs. Booking is also open online via mobile tyre fitting.
Frequently asked questions
The G20 3 Series commonly uses 205/60 R16 or 225/50 R17, while the M340i and many M Sport cars use staggered sizes such as 225/45 R18 front and 255/40 R18 rear. Check both axles on your own car.
Yes, it is legal, but most 3 Series have no spare, so you will need a sealant kit or a space-saver to deal with a puncture. Many owners keep run-flats for that reason.
No. Staggered cars have different sizes front and rear, so tyres cannot be moved between axles. The rears often wear out first on rear-wheel-drive cars.
The star marks a tyre approved by BMW for its cars. It is not compulsory, but star-marked tyres are developed for the car's handling and run-flat system.
Most 3 Series are rear-wheel drive and many are staggered, so the rear tyres put the power down and cannot be swapped to the front. Brisk driving speeds that up. Keep an eye on rear tread depth in particular.