Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/35r17 vs 295/50r15 Tire Comparison Side By Side
  315/35-17 295/50-15 Difference
Diameter inches (mm) 25.68 (652.3) 26.61 (676) 0.93 (23.7) 3.6%
Width inches (mm) 12.4 (315) 11.61 (295) -0.79 (-20) -6.3%
Circum. inches (mm) 80.68 (2049.26) 83.61 (2123.72) 2.93 (74.46) 3.6%
Sidewall Height inches (mm) 4.34 (110.25) 5.81 (147.5) 1.47 (37.25) 33.8%
Revolutions per mile (km) 785.33 (487.98) 757.8 (470.87) -27.53 (-17.11) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.73 mph (33.36 km/h)
25 mph (40.23 km/h)25.91 mph (41.7 km/h)
30 mph (48.28 km/h)31.09 mph (50.03 km/h)
35 mph (56.33 km/h)36.27 mph (58.37 km/h)
40 mph (64.37 km/h)41.45 mph (66.71 km/h)
45 mph (72.42 km/h)46.63 mph (75.05 km/h)
50 mph (80.47 km/h)51.82 mph (83.39 km/h)
55 mph (88.51 km/h)57 mph (91.73 km/h)
60 mph (96.56 km/h)62.18 mph (100.07 km/h)
65 mph (104.61 km/h)67.36 mph (108.41 km/h)
70 mph (112.65 km/h)72.54 mph (116.75 km/h)
75 mph (120.7 km/h)77.72 mph (125.09 km/h)
80 mph (128.75 km/h)82.91 mph (133.43 km/h)
85 mph (136.79 km/h)88.09 mph (141.76 km/h)
90 mph (144.84 km/h)93.27 mph (150.1 km/h)
95 mph (152.89 km/h)98.45 mph (158.44 km/h)
100 mph (160.93 km/h)103.63 mph (166.78 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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