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 245/60r15 Tire Comparison Side By Side
  265/60-15 245/60-15 Difference
Diameter inches (mm) 27.52 (699) 26.57 (675) -0.94 (-24) -3.4%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 86.46 (2195.97) 83.49 (2120.58) -2.97 (-75.4) -3.4%
Sidewall Height inches (mm) 6.26 (159) 5.79 (147) -0.47 (-12) -7.5%
Revolutions per mile (km) 732.86 (455.38) 758.92 (471.57) 26.06 (16.19) 3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.31 mph (31.08 km/h)
25 mph (40.23 km/h)24.14 mph (38.85 km/h)
30 mph (48.28 km/h)28.97 mph (46.62 km/h)
35 mph (56.33 km/h)33.8 mph (54.39 km/h)
40 mph (64.37 km/h)38.63 mph (62.16 km/h)
45 mph (72.42 km/h)43.45 mph (69.93 km/h)
50 mph (80.47 km/h)48.28 mph (77.7 km/h)
55 mph (88.51 km/h)53.11 mph (85.47 km/h)
60 mph (96.56 km/h)57.94 mph (93.25 km/h)
65 mph (104.61 km/h)62.77 mph (101.02 km/h)
70 mph (112.65 km/h)67.6 mph (108.79 km/h)
75 mph (120.7 km/h)72.42 mph (116.56 km/h)
80 mph (128.75 km/h)77.25 mph (124.33 km/h)
85 mph (136.79 km/h)82.08 mph (132.1 km/h)
90 mph (144.84 km/h)86.91 mph (139.87 km/h)
95 mph (152.89 km/h)91.74 mph (147.64 km/h)
100 mph (160.93 km/h)96.57 mph (155.41 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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