245/40 on 18x12.0 rim

Looking for a new wheel setup and not sure if 245/40 tire size fits on the 18x12.0 rim? Apparently, tires of a given size fit on a limited number of rims based on the wheel radius and width. To decide if 245/40 will fit the 18x12.0 wheels, we have examined data both from manufacturers and car tuners.

Our analytical report answers the question whether 245/40 tires match the 18x12.0 rim and what kind of inconveniences and troubles car owners may encounter using this combination. We also have collected the most popular tire sizes for the 18x12.0 rim and rim widths for a 245/40 R18 tire size.

On top of that we suggest exploring some real-life projects with photos to see how car enthusiasts managed to mount 245/40 tires size on the 18x12.0 rims.

Will a P 245/40 R18 tire fit 18x12.0 rim?


Yes, it will fit, but might need fenders rolling and pulling.

Rim width 304 mm
Tire width 245 mm
Aspect ratio 40%
Rim Diameter R18
Recommended rim width 8.0 - 9.5
Popular tire sizes for a 18x12.0 rim P 235/40 R18–P 265/35 R18, P 225/35 R18–P 265/35 R18, P 225/40 R18–P 275/35 R18
Popular rim widths for a P 245/40 R18 tire size 18x9.5, 18x8.5, 18x8.0

See how a tire P 245/40 R18 looks on 18x12.0 rim


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