18-inch square road setup
- Front and rear
- 18 × 8.5 inch, ET40 · 225/40 R18
Apex lists this primary tyre size as a direct fit. Wider tyres can need front camber adjustments; check the exact tyre and suspension combination.
2011–2019 · hatchback
BMW M140i / 1 Series F20 / F21 wheel fitment
The rear-wheel-drive F20 platform has limited room around the front struts and rear inner arches. M135i and M140i owners commonly choose purpose-made high-offset wheels to add tyre width.
5x120 bolt pattern · 72.6 mm centre bore · Stock wheels: 16 × 7, 18 × 7.5, 18 × 8 inch · Stock tyres: 205/55 R16, 225/40 R18, 245/35 R18
Updated 2026-10-04 · Medium source confidence. Check your exact trim and market. How we check specs
Quick specs
| Specification | Value |
|---|---|
| Bolt pattern | |
| Stock tyre sizes | |
| Centre bore | 72.6 mm |
| Fastener and thread | Wheel bolt, M14x1.25 |
| Tightening torque | 140 Nm (confirm in your handbook) |
Stock wheels and tyres
Factory options vary by trim and market. Match your car to the row below and check its tyre placard before using it as a baseline.
| Trim | Axle | Wheel | Tyre |
|---|---|---|---|
| Ordinary 1 Series with standard brakes, Style 378 | Front and rear | 16 × 7 inch, ET40 | 205/55 R16 |
| M135i / M140i, Style 436M | Front | 18 × 7.5 inch, ET45 | 225/40 R18 |
| M135i / M140i, Style 436M | Rear | 18 × 8 inch, ET52 | 245/35 R18 |
Explained in our guides
Read these before choosing wheels for the M140i / 1 Series: they explain the offset, fitment and hub numbers in this guide.
- Wheel offset explained: choosing ET without guessingUnderstand positive and negative wheel offset, calculate inner clearance and outer position, and choose an ET using measurements from your own car.
- Flush, poke and tucked fitment: measure the whole tyreUnderstand flush, poked and tucked wheels, calculate how width and offset change the look, and check clearance beyond a parked side-on photograph.
- Staggered vs square wheels: tyres, rotation and AWDCompare square and staggered wheel setups, calculate front-to-rear tyre diameter, and understand rotation limits and all-wheel-drive requirements.
Popular community setups
Starting points for a build. Read the notes with each setup, especially if your car is lowered or has different brakes.
18-inch wider rear
- Front
- 18 × 8.5 inch, ET40 · 225/40 R18
- Rear
- 18 × 9.5 inch, ET58 · 255/35 R18
Apex lists this pair for both rear-wheel drive and xDrive. Rear liner and shock dust-boot clearance is tight; wider-running 255 tyres can need 3 mm rear spacers or local liner and dust-boot trimming.
Width and offset guidance
Offset range
Check the exact setup
There is no confirmed range for this car yet. Compare a known wheel with your proposed size and measure both sides.
Common width limit
Measure before ordering
A maximum width has not been confirmed. Tyre shape, ride height and alignment all change the available space.
These figures belong to the setups described here. Combining the widest wheel with either end of the offset range does not guarantee a safe fit. For how ET moves the wheel in and out, read wheel offset explained; for how far the tyre can sit out, see flush, poke and tucked fitment.
Clearance notes
- The generation starts in 2011, but the M140i arrived in 2016. The 16-inch entry is for ordinary 1 Series models with suitable brakes, not the M135i or M140i.
- M Performance brake clearance must be confirmed with the wheel manufacturer.
- The front-wheel-drive F40 uses 5x112 and is outside this guide.
- The nominal 72.6 mm hub is also described as 72.56 or 72.5 mm in BMW fitment catalogues.
- Check full steering lock and suspension travel with the car loaded. Match wheel load rating, tyre load and speed ratings, fastener seats and brake clearance.
See it on your car.
Upload a photo and start with a look that suits the M140i / 1 Series. Try the wheels, colour and stance before you spend on parts.
An AI preview shows the look. It cannot verify physical fitment.
Run the numbers
These tools start with the Ordinary 1 Series with standard brakes, Style 378 front size. Choose your own trim or axle in the calculator if it differs.
Questions
What is the M140i bolt pattern?
The F20/F21 M140i uses 5x120, a nominal 72.6 mm centre bore and M14x1.25 bolts.
What are the standard M140i tyre sizes?
The 18-inch staggered package uses 225/40 R18 front and 245/35 R18 rear tyres.
Will 255 rear tyres fit an M140i?
Apex documents 255/35 R18 on 18x9.5 ET58 wheels. Check rear inner liners and shock dust boots because some tyre models need extra clearance.
What wheel size does the BMW M140i / 1 Series F20 / F21 use?
Factory wheels are 16 × 7 inch, 18 × 7.5 inch and 18 × 8 inch, depending on trim. The stock table lists the offset for each.
What is the BMW M140i / 1 Series F20 / F21 centre bore?
72.6 mm. Aftermarket wheels with a larger bore need hub-centric rings sized to it.
What is the BMW M140i / 1 Series F20 / F21 wheel bolt torque?
140 Nm (about 103 lb-ft) for the original bolts. Confirm in your handbook, especially with aftermarket wheels or bolts.
Specs checked against
- Apex F20/F21 fitment guide
- LFI F20 hardware specifications
- BMW hub, bolt pattern and thread table
- BMW approved F20 wheel and tyre combinations
- BM Autosport original 436M wheel set
- UK torque cross-check
- Original BMW Style 378 dimensions
- BMW F20 factory wheel packages
- BMW wheel tightening table covering F20 and F21
This guide is a starting point, not a fitment guarantee. Specs can differ by market, trim and previous modifications. Confirm all sizes, clearances and fastener requirements with a qualified wheel and tyre professional before buying or fitting parts.
Related cars
More guides from BMW or cars with the same bolt pattern. A matching pattern alone does not make a wheel interchangeable.