Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/50r15 vs 255/50r17 Tire Comparison Side By Side
  295/50-15 255/50-17 Difference
Diameter inches (mm) 26.61 (676) 27.04 (686.8) 0.43 (10.8) 1.6%
Width inches (mm) 11.61 (295) 10.04 (255) -1.57 (-40) -13.6%
Circum. inches (mm) 83.61 (2123.72) 84.95 (2157.65) 1.34 (33.93) 1.6%
Sidewall Height inches (mm) 5.81 (147.5) 5.02 (127.5) -0.79 (-20) -13.6%
Revolutions per mile (km) 757.8 (470.87) 745.88 (463.47) -11.92 (-7.4) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.32 mph (32.7 km/h)
25 mph (40.23 km/h)25.4 mph (40.88 km/h)
30 mph (48.28 km/h)30.48 mph (49.05 km/h)
35 mph (56.33 km/h)35.56 mph (57.23 km/h)
40 mph (64.37 km/h)40.64 mph (65.4 km/h)
45 mph (72.42 km/h)45.72 mph (73.58 km/h)
50 mph (80.47 km/h)50.8 mph (81.75 km/h)
55 mph (88.51 km/h)55.88 mph (89.93 km/h)
60 mph (96.56 km/h)60.96 mph (98.1 km/h)
65 mph (104.61 km/h)66.04 mph (106.28 km/h)
70 mph (112.65 km/h)71.12 mph (114.45 km/h)
75 mph (120.7 km/h)76.2 mph (122.63 km/h)
80 mph (128.75 km/h)81.28 mph (130.8 km/h)
85 mph (136.79 km/h)86.36 mph (138.98 km/h)
90 mph (144.84 km/h)91.44 mph (147.16 km/h)
95 mph (152.89 km/h)96.52 mph (155.33 km/h)
100 mph (160.93 km/h)101.6 mph (163.51 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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