Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/50r15 vs 295/50r15 Tire Comparison Side By Side
  245/50-15 295/50-15 Difference
Diameter inches (mm) 24.65 (626) 26.61 (676) 1.97 (50) 8%
Width inches (mm) 9.65 (245) 11.61 (295) 1.97 (50) 20.4%
Circum. inches (mm) 77.43 (1966.64) 83.61 (2123.72) 6.18 (157.08) 8%
Sidewall Height inches (mm) 4.82 (122.5) 5.81 (147.5) 0.98 (25) 20.4%
Revolutions per mile (km) 818.32 (508.48) 757.8 (470.87) -60.53 (-37.61) -7.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.6 mph (34.76 km/h)
25 mph (40.23 km/h)27 mph (43.45 km/h)
30 mph (48.28 km/h)32.4 mph (52.14 km/h)
35 mph (56.33 km/h)37.8 mph (60.83 km/h)
40 mph (64.37 km/h)43.19 mph (69.52 km/h)
45 mph (72.42 km/h)48.59 mph (78.21 km/h)
50 mph (80.47 km/h)53.99 mph (86.89 km/h)
55 mph (88.51 km/h)59.39 mph (95.58 km/h)
60 mph (96.56 km/h)64.79 mph (104.27 km/h)
65 mph (104.61 km/h)70.19 mph (112.96 km/h)
70 mph (112.65 km/h)75.59 mph (121.65 km/h)
75 mph (120.7 km/h)80.99 mph (130.34 km/h)
80 mph (128.75 km/h)86.39 mph (139.03 km/h)
85 mph (136.79 km/h)91.79 mph (147.72 km/h)
90 mph (144.84 km/h)97.19 mph (156.41 km/h)
95 mph (152.89 km/h)102.59 mph (165.1 km/h)
100 mph (160.93 km/h)107.99 mph (173.79 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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