Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
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185/82r14 vs 195/65r14 Tire Comparison Side By Side
  185/82-14 195/65-14 Difference
Diameter inches (mm) 25.94 (659) 23.98 (609.1) -1.96 (-49.9) -7.6%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 81.51 (2070.31) 75.34 (1913.54) -6.17 (-156.77) -7.6%
Sidewall Height inches (mm) 5.97 (151.7) 4.99 (126.75) -0.98 (-24.95) -16.4%
Revolutions per mile (km) 777.34 (483.02) 841.03 (522.59) 63.68 (39.57) 8.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.49 mph (29.75 km/h)
25 mph (40.23 km/h)23.11 mph (37.19 km/h)
30 mph (48.28 km/h)27.73 mph (44.62 km/h)
35 mph (56.33 km/h)32.35 mph (52.06 km/h)
40 mph (64.37 km/h)36.97 mph (59.5 km/h)
45 mph (72.42 km/h)41.59 mph (66.94 km/h)
50 mph (80.47 km/h)46.21 mph (74.37 km/h)
55 mph (88.51 km/h)50.84 mph (81.81 km/h)
60 mph (96.56 km/h)55.46 mph (89.25 km/h)
65 mph (104.61 km/h)60.08 mph (96.69 km/h)
70 mph (112.65 km/h)64.7 mph (104.12 km/h)
75 mph (120.7 km/h)69.32 mph (111.56 km/h)
80 mph (128.75 km/h)73.94 mph (119 km/h)
85 mph (136.79 km/h)78.56 mph (126.44 km/h)
90 mph (144.84 km/h)83.19 mph (133.87 km/h)
95 mph (152.89 km/h)87.81 mph (141.31 km/h)
100 mph (160.93 km/h)92.43 mph (148.75 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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