Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/45r16 vs 265/75r16 Tire Comparison Side By Side
  315/45-16 265/75-16 Difference
Diameter inches (mm) 27.16 (689.9) 31.65 (803.9) 4.49 (114) 16.5%
Width inches (mm) 12.4 (315) 10.43 (265) -1.97 (-50) -15.9%
Circum. inches (mm) 85.33 (2167.38) 99.43 (2525.53) 14.1 (358.14) 16.5%
Sidewall Height inches (mm) 5.58 (141.75) 7.82 (198.75) 2.24 (57) 40.2%
Revolutions per mile (km) 742.53 (461.38) 637.23 (395.96) -105.3 (-65.43) -14.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.3 mph (37.51 km/h)
25 mph (40.23 km/h)29.13 mph (46.88 km/h)
30 mph (48.28 km/h)34.96 mph (56.26 km/h)
35 mph (56.33 km/h)40.78 mph (65.63 km/h)
40 mph (64.37 km/h)46.61 mph (75.01 km/h)
45 mph (72.42 km/h)52.44 mph (84.39 km/h)
50 mph (80.47 km/h)58.26 mph (93.76 km/h)
55 mph (88.51 km/h)64.09 mph (103.14 km/h)
60 mph (96.56 km/h)69.91 mph (112.52 km/h)
65 mph (104.61 km/h)75.74 mph (121.89 km/h)
70 mph (112.65 km/h)81.57 mph (131.27 km/h)
75 mph (120.7 km/h)87.39 mph (140.65 km/h)
80 mph (128.75 km/h)93.22 mph (150.02 km/h)
85 mph (136.79 km/h)99.05 mph (159.4 km/h)
90 mph (144.84 km/h)104.87 mph (168.77 km/h)
95 mph (152.89 km/h)110.7 mph (178.15 km/h)
100 mph (160.93 km/h)116.52 mph (187.53 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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