305/50r20 vs 275/60r18 Tire Comparison Table
Tire Size Comparison Visualizer
2553
20"
153
392 Revs/km
2472
18"
165
405 Revs/km
305
813
275
787
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Speedometer Error
(Set Size1 to OEM Size)
(Set Size1 to OEM Size)
| Speed | 10 km/h | 30 km/h | 50 km/h | 70 km/h | 90 km/h | 110 km/h | 130 km/h | 150 km/h |
|---|---|---|---|---|---|---|---|---|
| Actual | 9.7 | 29.1 | 48.5 | 67.9 | 87.3 | 106.7 | 126.1 | 145.5 |
| Speed Diff | -0.3 | -0.9 | -1.5 | -2.1 | -2.7 | -3.3 | -3.9 | -4.5 |
Ground Clearance Decreased by 13
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Check out how the 305/50r20 differs in size from the 275/60r18
Would you like to upsize your tires?
The visuals and tables above illustrate the difference in dimensions between 305/50r20 and 275/60r18 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 305/50r20 and 275/60r18 tire sizes.
Besides, considering that 305/50r20 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 275/60r18 tires. It is strongly recommended to calibrate speedometer every time you upsize or downsize your tires.