Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/60r15 vs 295/50r15 Tire Comparison Side By Side
  295/60-15 295/50-15 Difference
Diameter inches (mm) 28.94 (735) 26.61 (676) -2.32 (-59) -8%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 90.91 (2309.07) 83.61 (2123.72) -7.3 (-185.35) -8%
Sidewall Height inches (mm) 6.97 (177) 5.81 (147.5) -1.16 (-29.5) -16.7%
Revolutions per mile (km) 696.97 (433.07) 757.8 (470.87) 60.83 (37.8) 8.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.39 mph (29.6 km/h)
25 mph (40.23 km/h)22.99 mph (37 km/h)
30 mph (48.28 km/h)27.59 mph (44.4 km/h)
35 mph (56.33 km/h)32.19 mph (51.81 km/h)
40 mph (64.37 km/h)36.79 mph (59.21 km/h)
45 mph (72.42 km/h)41.39 mph (66.61 km/h)
50 mph (80.47 km/h)45.99 mph (74.01 km/h)
55 mph (88.51 km/h)50.59 mph (81.41 km/h)
60 mph (96.56 km/h)55.18 mph (88.81 km/h)
65 mph (104.61 km/h)59.78 mph (96.21 km/h)
70 mph (112.65 km/h)64.38 mph (103.61 km/h)
75 mph (120.7 km/h)68.98 mph (111.01 km/h)
80 mph (128.75 km/h)73.58 mph (118.41 km/h)
85 mph (136.79 km/h)78.18 mph (125.81 km/h)
90 mph (144.84 km/h)82.78 mph (133.21 km/h)
95 mph (152.89 km/h)87.37 mph (140.62 km/h)
100 mph (160.93 km/h)91.97 mph (148.02 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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