Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
195/60r13 vs 185/55r14 Tire Comparison Side By Side
  195/60-13 185/55-14 Difference
Diameter inches (mm) 22.21 (564.2) 22.01 (559.1) -0.2 (-5.1) -0.9%
Width inches (mm) 7.68 (195) 7.28 (185) -0.39 (-10) -5.1%
Circum. inches (mm) 69.78 (1772.49) 69.15 (1756.46) -0.63 (-16.02) -0.9%
Sidewall Height inches (mm) 4.61 (117) 4.01 (101.75) -0.6 (-15.25) -13%
Revolutions per mile (km) 907.96 (564.18) 916.24 (569.32) 8.28 (5.15) 0.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.82 mph (31.9 km/h)
25 mph (40.23 km/h)24.77 mph (39.87 km/h)
30 mph (48.28 km/h)29.73 mph (47.84 km/h)
35 mph (56.33 km/h)34.68 mph (55.82 km/h)
40 mph (64.37 km/h)39.64 mph (63.79 km/h)
45 mph (72.42 km/h)44.59 mph (71.77 km/h)
50 mph (80.47 km/h)49.55 mph (79.74 km/h)
55 mph (88.51 km/h)54.5 mph (87.71 km/h)
60 mph (96.56 km/h)59.46 mph (95.69 km/h)
65 mph (104.61 km/h)64.41 mph (103.66 km/h)
70 mph (112.65 km/h)69.37 mph (111.64 km/h)
75 mph (120.7 km/h)74.32 mph (119.61 km/h)
80 mph (128.75 km/h)79.28 mph (127.58 km/h)
85 mph (136.79 km/h)84.23 mph (135.56 km/h)
90 mph (144.84 km/h)89.19 mph (143.53 km/h)
95 mph (152.89 km/h)94.14 mph (151.51 km/h)
100 mph (160.93 km/h)99.1 mph (159.48 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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