Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
35/12.5r15 vs 265/75r15 Tire Comparison Side By Side
  35/12.5-15 265/75-15 Difference
Diameter inches (mm) 35.03 (889.8) 30.65 (778.5) -4.38 (-111.3) -12.5%
Width inches (mm) 12.52 (318) 10.43 (265) -2.09 (-53) -16.7%
Circum. inches (mm) 110.05 (2795.39) 96.29 (2445.73) -13.77 (-349.66) -12.5%
Sidewall Height inches (mm) 10.02 (254.4) 7.82 (198.75) -2.19 (-55.65) -21.9%
Revolutions per mile (km) 575.71 (357.73) 658.02 (408.88) 82.31 (51.14) 14.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.5 mph (28.16 km/h)
25 mph (40.23 km/h)21.87 mph (35.2 km/h)
30 mph (48.28 km/h)26.25 mph (42.24 km/h)
35 mph (56.33 km/h)30.62 mph (49.28 km/h)
40 mph (64.37 km/h)35 mph (56.32 km/h)
45 mph (72.42 km/h)39.37 mph (63.36 km/h)
50 mph (80.47 km/h)43.75 mph (70.4 km/h)
55 mph (88.51 km/h)48.12 mph (77.44 km/h)
60 mph (96.56 km/h)52.49 mph (84.48 km/h)
65 mph (104.61 km/h)56.87 mph (91.52 km/h)
70 mph (112.65 km/h)61.24 mph (98.56 km/h)
75 mph (120.7 km/h)65.62 mph (105.6 km/h)
80 mph (128.75 km/h)69.99 mph (112.64 km/h)
85 mph (136.79 km/h)74.37 mph (119.68 km/h)
90 mph (144.84 km/h)78.74 mph (126.72 km/h)
95 mph (152.89 km/h)83.12 mph (133.76 km/h)
100 mph (160.93 km/h)87.49 mph (140.8 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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