235/55r17 vs 235/55r18 Tire Comparison Table

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Tire Size Comparison Calculator

Size 1/R
Size 2/R
Size 1Size 2Difference
Tire Diameter6907163.8%
Tire Width2352350.0%
Sidewall Height1291290.0%
Circumference216822473.6%
Revs/km46144516.0
Speed Diff Ratio11.044.0%
Tire Size Comparison Visualizer
Tire 1 Side View
Tire 1 Wheel
2168
17"
129
461 Revs/km
Tire 2 Side View
Tire 2 Wheel
2247
18"
129
445 Revs/km
Tire 1 Front View
235
690
Tire 2 Front View
235
716
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Speedometer Error
(Set Size1 to OEM Size)

Speed 10 km/h30 km/h50 km/h70 km/h90 km/h110 km/h130 km/h150 km/h
Actual 10.431.252.072.893.6114.4135.2156.0
Speed Diff0.41.22.02.83.64.45.26.0

Ground Clearance Increased by 13

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Check out how the 235/55r17 differs in size from the 235/55r18

Would you like to upsize your tires?

The visuals and tables above illustrate the difference in dimensions between 235/55r17 and 235/55r18 tires.

By looking at a visual representation of the differences in tire diameter, width, sidewall height, circumference, revs per mile, and speed difference, it easy to compare the 235/55r17 and 235/55r18 tire sizes.

Besides, considering that 235/55r17 is the factory size, your vehicle’s speedometer shows the correct speed. Check out the chart with the possible speed difference should you decide to go with the 235/55r18 tires. It is strongly recommended to calibrate speedometer every time you upsize or downsize your tires.

Other sizes often compared:

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