Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r16 vs 205/50r16 Tire Comparison Side By Side
  135/80-16 205/50-16 Difference
Diameter inches (mm) 24.5 (622.4) 24.07 (611.4) -0.43 (-11) -1.8%
Width inches (mm) 5.31 (135) 8.07 (205) 2.76 (70) 51.9%
Circum. inches (mm) 76.98 (1955.33) 75.62 (1920.77) -1.36 (-34.56) -1.8%
Sidewall Height inches (mm) 4.25 (108) 4.04 (102.5) -0.22 (-5.5) -5.1%
Revolutions per mile (km) 823.06 (511.42) 837.86 (520.62) 14.81 (9.2) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.65 mph (31.62 km/h)
25 mph (40.23 km/h)24.56 mph (39.52 km/h)
30 mph (48.28 km/h)29.47 mph (47.43 km/h)
35 mph (56.33 km/h)34.38 mph (55.33 km/h)
40 mph (64.37 km/h)39.29 mph (63.24 km/h)
45 mph (72.42 km/h)44.2 mph (71.14 km/h)
50 mph (80.47 km/h)49.12 mph (79.05 km/h)
55 mph (88.51 km/h)54.03 mph (86.95 km/h)
60 mph (96.56 km/h)58.94 mph (94.85 km/h)
65 mph (104.61 km/h)63.85 mph (102.76 km/h)
70 mph (112.65 km/h)68.76 mph (110.66 km/h)
75 mph (120.7 km/h)73.67 mph (118.57 km/h)
80 mph (128.75 km/h)78.59 mph (126.47 km/h)
85 mph (136.79 km/h)83.5 mph (134.38 km/h)
90 mph (144.84 km/h)88.41 mph (142.28 km/h)
95 mph (152.89 km/h)93.32 mph (150.19 km/h)
100 mph (160.93 km/h)98.23 mph (158.09 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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