Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r15 vs 195/55r16 Tire Comparison Side By Side
  135/80-15 195/55-16 Difference
Diameter inches (mm) 23.5 (597) 24.44 (620.9) 0.94 (23.9) 4%
Width inches (mm) 5.31 (135) 7.68 (195) 2.36 (60) 44.4%
Circum. inches (mm) 73.84 (1875.53) 76.8 (1950.61) 2.96 (75.08) 4%
Sidewall Height inches (mm) 4.25 (108) 4.22 (107.25) -0.03 (-0.75) -0.7%
Revolutions per mile (km) 858.07 (533.18) 825.04 (512.66) -33.03 (-20.52) -3.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.8 mph (33.48 km/h)
25 mph (40.23 km/h)26 mph (41.84 km/h)
30 mph (48.28 km/h)31.2 mph (50.21 km/h)
35 mph (56.33 km/h)36.4 mph (58.58 km/h)
40 mph (64.37 km/h)41.6 mph (66.95 km/h)
45 mph (72.42 km/h)46.8 mph (75.32 km/h)
50 mph (80.47 km/h)52 mph (83.69 km/h)
55 mph (88.51 km/h)57.2 mph (92.06 km/h)
60 mph (96.56 km/h)62.4 mph (100.43 km/h)
65 mph (104.61 km/h)67.6 mph (108.8 km/h)
70 mph (112.65 km/h)72.8 mph (117.16 km/h)
75 mph (120.7 km/h)78 mph (125.53 km/h)
80 mph (128.75 km/h)83.2 mph (133.9 km/h)
85 mph (136.79 km/h)88.4 mph (142.27 km/h)
90 mph (144.84 km/h)93.6 mph (150.64 km/h)
95 mph (152.89 km/h)98.8 mph (159.01 km/h)
100 mph (160.93 km/h)104 mph (167.38 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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