235/45R18 Tire Size Specifications
This tire size 235/45R18 fits 10 vehicles in our database.
Everything to know about the 235/45R18 tire size
Size geometry
A 235/45R18 tire has a 235mm section width and a 45% aspect ratio, mounted on a 18-inch rim. Sidewall height works out to 105.8mm (4.16") and overall outside diameter is 668.7mm (26.33"). At highway speed the tire completes about 476 revolutions per kilometre â your speedometer and odometer were calibrated against this number.
Direct substitute sizes
If 235/45R18 is unavailable, the closest same-diameter substitutes on the same rim are 225/47R18 and 245/43R18. Both keep your speedometer reading within 1% â safe for daily use, ABS, and stability control. Always verify load and speed ratings before swapping.
Plus / minus sizing options
For a 235/45R18 you can upsize to 245/38R19 (plus-one) to fit a larger wheel without changing the speedometer reading, or downsize to 225/53R17 (minus-one) for a softer ride or winter setup. Both stay inside the Âą3% diameter tolerance that ABS and TPMS systems expect.
Vehicle compatibility
10 vehicles in our database run the 235/45R18 tire size from the factory. Aftermarket fitment depends on rim width, offset, and clearance â match these specs to your wheel before purchasing tires.
Vehicles Using 235/45R18
Acura TSX
Years: 2010 - 2014
Aion Aion S
Years: 2019 - 2026
Aion S
Years: 2019 - 2026
Alfa Romeo Brera
Years: 2005 - 2010
Infiniti G35
Years: 2003 - 2008
Kia Seltos
Years: 2019 - 2026
Kia Soul
Years: 2019 - 2026
MG MG4
Years: 2022 - 2026
Nissan Altima
Years: 2013 - 2018
Peugeot 508
Years: 2010 - 2018
Toyota Camry
Years: 2025 - 2026