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 235/75r15 Tire Comparison Side By Side
  295/50-15 235/75-15 Difference
Diameter inches (mm) 26.61 (676) 28.88 (733.5) 2.26 (57.5) 8.5%
Width inches (mm) 11.61 (295) 9.25 (235) -2.36 (-60) -20.3%
Circum. inches (mm) 83.61 (2123.72) 90.72 (2304.36) 7.11 (180.64) 8.5%
Sidewall Height inches (mm) 5.81 (147.5) 6.94 (176.25) 1.13 (28.75) 19.5%
Revolutions per mile (km) 757.8 (470.87) 698.39 (433.96) -59.4 (-36.91) -7.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.7 mph (34.92 km/h)
25 mph (40.23 km/h)27.13 mph (43.66 km/h)
30 mph (48.28 km/h)32.55 mph (52.39 km/h)
35 mph (56.33 km/h)37.98 mph (61.12 km/h)
40 mph (64.37 km/h)43.4 mph (69.85 km/h)
45 mph (72.42 km/h)48.83 mph (78.58 km/h)
50 mph (80.47 km/h)54.25 mph (87.31 km/h)
55 mph (88.51 km/h)59.68 mph (96.04 km/h)
60 mph (96.56 km/h)65.1 mph (104.77 km/h)
65 mph (104.61 km/h)70.53 mph (113.51 km/h)
70 mph (112.65 km/h)75.95 mph (122.24 km/h)
75 mph (120.7 km/h)81.38 mph (130.97 km/h)
80 mph (128.75 km/h)86.8 mph (139.7 km/h)
85 mph (136.79 km/h)92.23 mph (148.43 km/h)
90 mph (144.84 km/h)97.66 mph (157.16 km/h)
95 mph (152.89 km/h)103.08 mph (165.89 km/h)
100 mph (160.93 km/h)108.51 mph (174.62 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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