Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/25r20 vs 265/35r22 Tire Comparison Side By Side
  275/25-20 265/35-22 Difference
Diameter inches (mm) 25.41 (645.5) 29.3 (744.3) 3.89 (98.8) 15.3%
Width inches (mm) 10.83 (275) 10.43 (265) -0.39 (-10) -3.6%
Circum. inches (mm) 79.84 (2027.9) 92.06 (2338.29) 12.22 (310.39) 15.3%
Sidewall Height inches (mm) 2.71 (68.75) 3.65 (92.75) 0.94 (24) 34.9%
Revolutions per mile (km) 793.6 (493.12) 688.26 (427.66) -105.34 (-65.46) -13.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.06 mph (37.11 km/h)
25 mph (40.23 km/h)28.83 mph (46.39 km/h)
30 mph (48.28 km/h)34.59 mph (55.67 km/h)
35 mph (56.33 km/h)40.36 mph (64.95 km/h)
40 mph (64.37 km/h)46.12 mph (74.23 km/h)
45 mph (72.42 km/h)51.89 mph (83.51 km/h)
50 mph (80.47 km/h)57.65 mph (92.78 km/h)
55 mph (88.51 km/h)63.42 mph (102.06 km/h)
60 mph (96.56 km/h)69.18 mph (111.34 km/h)
65 mph (104.61 km/h)74.95 mph (120.62 km/h)
70 mph (112.65 km/h)80.71 mph (129.9 km/h)
75 mph (120.7 km/h)86.48 mph (139.18 km/h)
80 mph (128.75 km/h)92.24 mph (148.45 km/h)
85 mph (136.79 km/h)98.01 mph (157.73 km/h)
90 mph (144.84 km/h)103.78 mph (167.01 km/h)
95 mph (152.89 km/h)109.54 mph (176.29 km/h)
100 mph (160.93 km/h)115.31 mph (185.57 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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