Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r13 vs 155/70r13 Tire Comparison Side By Side
  135/70-13 155/70-13 Difference
Diameter inches (mm) 20.44 (519.2) 21.54 (547.2) 1.1 (28) 5.4%
Width inches (mm) 5.31 (135) 6.1 (155) 0.79 (20) 14.8%
Circum. inches (mm) 64.22 (1631.11) 67.68 (1719.08) 3.46 (87.96) 5.4%
Sidewall Height inches (mm) 3.72 (94.5) 4.27 (108.5) 0.55 (14) 14.8%
Revolutions per mile (km) 986.65 (613.08) 936.17 (581.71) -50.49 (-31.37) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.08 mph (33.92 km/h)
25 mph (40.23 km/h)26.35 mph (42.4 km/h)
30 mph (48.28 km/h)31.62 mph (50.88 km/h)
35 mph (56.33 km/h)36.89 mph (59.36 km/h)
40 mph (64.37 km/h)42.16 mph (67.85 km/h)
45 mph (72.42 km/h)47.43 mph (76.33 km/h)
50 mph (80.47 km/h)52.7 mph (84.81 km/h)
55 mph (88.51 km/h)57.97 mph (93.29 km/h)
60 mph (96.56 km/h)63.24 mph (101.77 km/h)
65 mph (104.61 km/h)68.51 mph (110.25 km/h)
70 mph (112.65 km/h)73.78 mph (118.73 km/h)
75 mph (120.7 km/h)79.04 mph (127.21 km/h)
80 mph (128.75 km/h)84.31 mph (135.69 km/h)
85 mph (136.79 km/h)89.58 mph (144.17 km/h)
90 mph (144.84 km/h)94.85 mph (152.65 km/h)
95 mph (152.89 km/h)100.12 mph (161.13 km/h)
100 mph (160.93 km/h)105.39 mph (169.61 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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