Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/50r20 vs 285/40r22 Tire Comparison Side By Side
  265/50-20 285/40-22 Difference
Diameter inches (mm) 30.43 (773) 30.98 (786.8) 0.54 (13.8) 1.8%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 95.61 (2428.45) 97.32 (2471.81) 1.71 (43.35) 1.8%
Sidewall Height inches (mm) 5.22 (132.5) 4.49 (114) -0.73 (-18.5) -14%
Revolutions per mile (km) 662.7 (411.78) 651.08 (404.56) -11.62 (-7.22) -1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.36 mph (32.76 km/h)
25 mph (40.23 km/h)25.45 mph (40.95 km/h)
30 mph (48.28 km/h)30.54 mph (49.14 km/h)
35 mph (56.33 km/h)35.62 mph (57.33 km/h)
40 mph (64.37 km/h)40.71 mph (65.52 km/h)
45 mph (72.42 km/h)45.8 mph (73.71 km/h)
50 mph (80.47 km/h)50.89 mph (81.9 km/h)
55 mph (88.51 km/h)55.98 mph (90.09 km/h)
60 mph (96.56 km/h)61.07 mph (98.28 km/h)
65 mph (104.61 km/h)66.16 mph (106.48 km/h)

Gear Ratio / RPMs for New Tire (@ 65 mph)
2.35 2.73 2.94 3.07 3.21 3.31 3.42 3.55 3.73 3.91 4.11 4.27 4.56 4.88 5.13 5.29 5.38 5.71 6.17 7.17
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