What size are Civic SI wheels?
The latest Honda Civic Si sold in the United States uses 18-inch wheels (8.0 inches wide) paired with 235/40R18 tires. This article explains the current specification, how it differs across generations, and what to consider if you’re shopping for replacements or upgrades.
Current-generation US-spec wheel sizing
For the current US-market Civic Si (model years 2022–present), the factory wheels are 18 inches in diameter and 8 inches wide, with 235/40R18 tires.
- Diameter: 18 inches
- Width: 8.0 inches
- Tire size: 235/40R18
In short, US-spec Civics Si currently use 18x8 wheels with 235/40R18 tires.
Market and generational variations
Wheel sizes for the Civic Si have varied by generation and market. While the current US-spec model uses 18-inch wheels, earlier generations and international markets have offered different sizes depending on trim packages and regional preferences.
- Earlier generations commonly used smaller wheels on performance-oriented Si variants
- Some international markets offered 19-inch wheels as part of sport or appearance packages
Check the exact wheel size listed on the window sticker or the official brochure for the specific model year and market you are considering.
Aftermarket considerations
When thinking about aftermarket wheels for a Civic Si, keep these factors in mind to maintain proper fit and performance.
- Ensure the replacement matches the vehicle’s bolt pattern and center bore, and uses an appropriate offset
- Maintain an appropriate tire size to preserve handling characteristics and speedometer accuracy
- Verify there is sufficient clearance for brakes and suspension components, especially if stepping away from stock sizes
Consult a qualified shop or the dealer to confirm the exact specs for your model year before purchasing aftermarket wheels.
What this means for buyers and owners
For most current Civic Si buyers in the United States, 18x8-inch wheels with 235/40R18 tires are the standard. If you’re shopping used, sourcing parts in other markets, or considering older generations, verify the specific wheel size for that year and trim to ensure proper fitment and performance.
Summary
The Civic Si’s wheel size today is typically 18x8 inches with 235/40R18 tires in the U.S., but sizes have varied by generation and region. Always verify the exact specification for the model year and market you’re interested in, especially when shopping for replacements or aftermarket options.
What size rims are on a 2018 Honda Civic Si?
The 2018 Honda Civic Si stock wheel size is 18x8 inches with a tire size of 235/40R18. These are the original equipment (OE) specifications for both the Sedan and Coupe models.
- Wheel: 18x8 inches
- Tire: 235/40R18
What size wheels are on a 2019 Honda Civic Si?
The 2019 Honda Civic Si has a stock wheel size of 18 inches (18x8) with a tire size of 235/40R18. The wheels have an offset of +50mm, and the bolt pattern is 5x114.3.
- Stock Wheel Size: 18x8
- Stock Tire Size: 235/40R18
- Stock Offset: +50mm
- Bolt Pattern: 5x114.3
What size are stock Civic Si wheels?
Wheel Configuration Reference
| Vehicle Make / Model | Year Range | Wheel Size Range |
|---|---|---|
| Honda Civic (All Except Si and Type R) | 2016 to 2021 | (16x7) to (19x8.5) |
| Honda Civic (Type R) | 2017 to 2021 | (19x8.5) to (20x9.5) |
| Honda Civic (Si) | 2017 to 2020 | (18x8) to (20x9) |
| Honda Civic (Si) | 2022 to 2026 | (18x8) to (20x9) |
What size tires are on a Honda Civic Si?
The standard tire size for a Honda Civic Si is 235/40R18 for models from 2017 to 2025. For older models, the factory tire size may vary, with some earlier generations using 215/55R16 or 215/50R17 on smaller wheels. It's best to check the sticker on the driver's side door jamb or the sidewall of your current tires for the exact size.
Common tire sizes for Honda Civic Si
- 235/40R18: This is the standard size for the 2017-2025 models, equipped with 18-inch wheels.
- 215/55R16: Found on some older Civic models with 16-inch wheels, but not typically the Si trim.
- 215/50R17: Also found on some older Civic models with 17-inch wheels.
How to confirm your tire size
- Check the tire sidewall: The tire size is printed on the side of the tire itself in a format like P235/40R18.
- Look at the driver's side door jamb: A sticker on the door jamb contains the original equipment (OE) tire size for your specific vehicle.
