Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/70r15 vs 295/50r15 Tire Comparison Side By Side
  255/70-15 295/50-15 Difference
Diameter inches (mm) 29.06 (738) 26.61 (676) -2.44 (-62) -8.4%
Width inches (mm) 10.04 (255) 11.61 (295) 1.57 (40) 15.7%
Circum. inches (mm) 91.28 (2318.5) 83.61 (2123.72) -7.67 (-194.78) -8.4%
Sidewall Height inches (mm) 7.03 (178.5) 5.81 (147.5) -1.22 (-31) -17.4%
Revolutions per mile (km) 694.13 (431.31) 757.8 (470.87) 63.66 (39.56) 9.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.32 mph (29.48 km/h)
25 mph (40.23 km/h)22.9 mph (36.85 km/h)
30 mph (48.28 km/h)27.48 mph (44.22 km/h)
35 mph (56.33 km/h)32.06 mph (51.6 km/h)
40 mph (64.37 km/h)36.64 mph (58.97 km/h)
45 mph (72.42 km/h)41.22 mph (66.34 km/h)
50 mph (80.47 km/h)45.8 mph (73.71 km/h)
55 mph (88.51 km/h)50.38 mph (81.08 km/h)
60 mph (96.56 km/h)54.96 mph (88.45 km/h)
65 mph (104.61 km/h)59.54 mph (95.82 km/h)
70 mph (112.65 km/h)64.12 mph (103.19 km/h)
75 mph (120.7 km/h)68.7 mph (110.56 km/h)
80 mph (128.75 km/h)73.28 mph (117.93 km/h)
85 mph (136.79 km/h)77.86 mph (125.3 km/h)
90 mph (144.84 km/h)82.44 mph (132.67 km/h)
95 mph (152.89 km/h)87.02 mph (140.04 km/h)
100 mph (160.93 km/h)91.6 mph (147.41 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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