Mild daily fitment
- Front and rear
- 18 × 8.5 inch, ET45 · 235/40 R18
KamiSpeed identifies this width and offset as a conservative eleventh-generation fitment. The original tyre size can be retained where approved for the selected rim.
2022–present · saloon
Honda Civic Si FE1 / 11th gen wheel fitment
The FE1 Si starts with 18-inch wheels and equal tyre sizes front and rear. Owners commonly retain that diameter while choosing a wider wheel and a lower offset for a fuller arch fit.
5x114.3 bolt pattern · 64.1 mm centre bore · Stock wheels: 18 × 8 inch · Stock tyres: 235/40 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 | 64.1 mm |
| Fastener and thread | Wheel nut, M12x1.5 |
| Tightening torque | 108 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 |
|---|---|---|---|
| Si, standard all-season tyres | Front and rear | 18 × 8 inch, ET50 | 235/40 R18 |
| Si HPT, factory summer-tyre option where offered | Front and rear | 18 × 8 inch, ET50 | 235/40 R18 |
Explained in our guides
Read these before choosing wheels for the Civic Si: 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.
- Hub-centric vs lug-centric wheels: choosing hub ringsLearn what hub rings do, how to specify their inner and outer diameters, and why centring, wheel seats and vibration need separate checks.
Popular community setups
Starting points for a build. Read the notes with each setup, especially if your car is lowered or has different brakes.
Wider street fitment
- Front and rear
- 18 × 9 inch, ET35 · 245/35 R18
This combination is documented by WheelPrice; Apex also lists 18x9 ET35 for the eleventh-generation Civic. Check arch clearance and alignment on lowered cars.
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
- FE1 Si mounting specifications differ from the FL5 Type R: the Si uses 5x114.3 and M12 studs.
- Factory wheel nuts have a ball seat. Use the seat type required by the replacement wheels.
- Lowering reduces clearance at the arch; a wheel size alone does not guarantee the same fit with every tyre model.
- 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 Civic Si. 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 Si, standard all-season tyres front size. Choose your own trim or axle in the calculator if it differs.
Questions
What bolt pattern does the 2022-on Civic Si use?
5x114.3, with a 64.1 mm centre bore and M12x1.5 nuts.
What are the stock FE1 Si wheel sizes?
18x8 ET50, with 235/40 R18 tyres on both axles.
Will FL5 Type R wheels bolt onto a Civic Si?
No. The FL5 uses 5x120; the FE1 Si uses 5x114.3.
What is the Civic Si wheel nut torque?
Honda specifies 108 Nm, including the eleventh-generation Si.
What size tyres does the Honda Civic Si FE1 / 11th gen have?
Factory tyre (tire) sizes for the 2022–present Honda Civic Si FE1 / 11th gen are 235/40 R18, depending on trim. Your tyre placard shows the size for your car.
What is the Honda Civic Si FE1 / 11th gen centre bore?
64.1 mm. Aftermarket wheels with a larger bore need hub-centric rings sized to it.
Specs checked against
- H&R Honda application catalogue, hub and stud specifications
- Honda service bulletin 24-119, wheel nut torque table
- Honda Si factory specifications
- Wheel-Size 2022 Civic factory offsets
- KamiSpeed eleventh-generation fitment examples
- WheelPrice eleventh-generation Civic fitments
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 Honda or cars with the same bolt pattern. A matching pattern alone does not make a wheel interchangeable.