Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/60r15 vs 225/70r15 Tire Comparison Side By Side
  265/60-15 225/70-15 Difference
Diameter inches (mm) 27.52 (699) 27.4 (696) -0.12 (-3) -0.4%
Width inches (mm) 10.43 (265) 8.86 (225) -1.57 (-40) -15.1%
Circum. inches (mm) 86.46 (2195.97) 86.08 (2186.55) -0.37 (-9.42) -0.4%
Sidewall Height inches (mm) 6.26 (159) 6.2 (157.5) -0.06 (-1.5) -0.9%
Revolutions per mile (km) 732.86 (455.38) 736.02 (457.34) 3.16 (1.96) 0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.91 mph (32.05 km/h)
25 mph (40.23 km/h)24.89 mph (40.06 km/h)
30 mph (48.28 km/h)29.87 mph (48.07 km/h)
35 mph (56.33 km/h)34.85 mph (56.09 km/h)
40 mph (64.37 km/h)39.83 mph (64.1 km/h)
45 mph (72.42 km/h)44.81 mph (72.11 km/h)
50 mph (80.47 km/h)49.79 mph (80.12 km/h)
55 mph (88.51 km/h)54.76 mph (88.13 km/h)
60 mph (96.56 km/h)59.74 mph (96.15 km/h)
65 mph (104.61 km/h)64.72 mph (104.16 km/h)
70 mph (112.65 km/h)69.7 mph (112.17 km/h)
75 mph (120.7 km/h)74.68 mph (120.18 km/h)
80 mph (128.75 km/h)79.66 mph (128.2 km/h)
85 mph (136.79 km/h)84.64 mph (136.21 km/h)
90 mph (144.84 km/h)89.61 mph (144.22 km/h)
95 mph (152.89 km/h)94.59 mph (152.23 km/h)
100 mph (160.93 km/h)99.57 mph (160.24 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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