Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
36/12.5r16.5 vs 265/75r16 Tire Comparison Side By Side
  36/12.5-16.5 265/75-16 Difference
Diameter inches (mm) 36.03 (915.18) 31.65 (803.9) -4.38 (-111.28) -12.2%
Width inches (mm) 12.52 (318) 10.43 (265) -2.09 (-53) -16.7%
Circum. inches (mm) 113.19 (2875.12) 99.43 (2525.53) -13.76 (-349.6) -12.2%
Sidewall Height inches (mm) 9.77 (248.04) 7.82 (198.75) -1.94 (-49.29) -19.9%
Revolutions per mile (km) 559.75 (347.81) 637.23 (395.96) 77.48 (48.15) 13.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.57 mph (28.27 km/h)
25 mph (40.23 km/h)21.96 mph (35.34 km/h)
30 mph (48.28 km/h)26.35 mph (42.41 km/h)
35 mph (56.33 km/h)30.74 mph (49.48 km/h)
40 mph (64.37 km/h)35.14 mph (56.55 km/h)
45 mph (72.42 km/h)39.53 mph (63.61 km/h)
50 mph (80.47 km/h)43.92 mph (70.68 km/h)
55 mph (88.51 km/h)48.31 mph (77.75 km/h)
60 mph (96.56 km/h)52.7 mph (84.82 km/h)
65 mph (104.61 km/h)57.1 mph (91.89 km/h)
70 mph (112.65 km/h)61.49 mph (98.96 km/h)
75 mph (120.7 km/h)65.88 mph (106.02 km/h)
80 mph (128.75 km/h)70.27 mph (113.09 km/h)
85 mph (136.79 km/h)74.66 mph (120.16 km/h)
90 mph (144.84 km/h)79.06 mph (127.23 km/h)
95 mph (152.89 km/h)83.45 mph (134.3 km/h)
100 mph (160.93 km/h)87.84 mph (141.37 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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