The Honda Civic Si currently rides on 18-inch wheels, specifically 18x8.0 inches with 235/40R18 tires. Across different generations, wheel sizes have varied from 17 to 19 inches depending on year and market.
Current generation: 11th generation Civic Si (2022–present)
The 11th generation Civic Si retains a relatively simple, performance-oriented wheel package. The upcoming list covers the primary wheel and tire sizing used on US-market models.
Key wheel and tire specifications for the current Civic Si are the following:
- Wheel size: 18x8.0 inches
- Tire size: 235/40R18
- Wheel type: alloy
These specifications help balance grip, ride quality, and brake clearance on the latest Si, aligning with Honda’s focus on a spirited yet daily-driver-friendly package.
Older Civic Si generations (overview)
Wheel sizes for Civic Si models prior to the 11th generation have varied by year and market. For exact figures, consult the specific model year brochures or the owner's manual. In general, earlier Si versions commonly used 17- to 18-inch wheels, with some performance variants offering larger diameters in certain markets.
Because the Si has appeared in several generations with different platform geometries and brake setups, always verify the wheel size for your exact year and trim to ensure compatibility with tires, brakes, and suspension components.
Summary
The current Honda Civic Si uses 18-inch wheels (18x8.0) paired with 235/40R18 tires. Across its history, wheel sizes have varied widely by generation and market, typically ranging from 17 to 19 inches. For any specific year, check Honda’s official specifications or your owner’s manual to confirm the exact size.