Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r13 vs 195/55r14 Tire Comparison Side By Side
  135/80-13 195/55-14 Difference
Diameter inches (mm) 21.5 (546.2) 22.44 (570.1) 0.94 (23.9) 4.4%
Width inches (mm) 5.31 (135) 7.68 (195) 2.36 (60) 44.4%
Circum. inches (mm) 67.56 (1715.94) 70.51 (1791.02) 2.96 (75.08) 4.4%
Sidewall Height inches (mm) 4.25 (108) 4.22 (107.25) -0.03 (-0.75) -0.7%
Revolutions per mile (km) 937.88 (582.77) 898.56 (558.34) -39.32 (-24.43) -4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.88 mph (33.6 km/h)
25 mph (40.23 km/h)26.09 mph (41.99 km/h)
30 mph (48.28 km/h)31.31 mph (50.39 km/h)
35 mph (56.33 km/h)36.53 mph (58.79 km/h)
40 mph (64.37 km/h)41.75 mph (67.19 km/h)
45 mph (72.42 km/h)46.97 mph (75.59 km/h)
50 mph (80.47 km/h)52.19 mph (83.99 km/h)
55 mph (88.51 km/h)57.41 mph (92.39 km/h)
60 mph (96.56 km/h)62.63 mph (100.79 km/h)
65 mph (104.61 km/h)67.84 mph (109.18 km/h)
70 mph (112.65 km/h)73.06 mph (117.58 km/h)
75 mph (120.7 km/h)78.28 mph (125.98 km/h)
80 mph (128.75 km/h)83.5 mph (134.38 km/h)
85 mph (136.79 km/h)88.72 mph (142.78 km/h)
90 mph (144.84 km/h)93.94 mph (151.18 km/h)
95 mph (152.89 km/h)99.16 mph (159.58 km/h)
100 mph (160.93 km/h)104.38 mph (167.98 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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