Most 2018 Honda Accord 1.5T models use 235/45R18 tires on the 18-inch wheels common to several trims. If your car has 17-inch wheels, expect 235/45R17. The exact size depends on the wheel option and trim, so verify with the vehicle’s placard.
Common OEM tire sizes by wheel diameter
The 1.5T variant was offered with different wheel packages depending on trim. The following sizes correspond to the wheel options you’re likely to encounter on stock cars.
- 235/45R18 — used with the 18-inch wheel packages (common on EX, EX-L, and Touring models with 18-inch wheels).
- 235/45R17 — used with the 17-inch wheel packages (on several LX/Sport/EX trims that rolled on 17-inch wheels).
In practice, 235/45R18 is the standard pairing for 18-inch wheels, while 235/45R17 applies to 17-inch wheels. Always confirm with the door placard for your exact configuration.
How to verify the exact size on your car
To confirm your specific tire size, check the tire placard on the driver’s side door jamb, or consult the owner's manual. The tire sidewall also shows the size (for example, 235/45R18). If you have aftermarket wheels, the size may differ; in that case, you should match the new tires to the recommended size.
Care and replacement tips
When replacing tires, try to replace all four tires at once to maintain balanced handling. Use tires with the same size, load index, and speed rating as the originals, and ensure correct inflation per the placard.
Summary
Bottom line: For a 2018 Honda Accord 1.5T, the typical OEM tire sizes are 235/45R18 on 18-inch wheels and 235/45R17 on 17-inch wheels. Always verify with the door jamb placard for your exact trim and wheel configuration.