Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
155/70r15 vs 295/50r15 Tire Comparison Side By Side
  155/70-15 295/50-15 Difference
Diameter inches (mm) 23.54 (598) 26.61 (676) 3.07 (78) 13%
Width inches (mm) 6.1 (155) 11.61 (295) 5.51 (140) 90.3%
Circum. inches (mm) 73.96 (1878.67) 83.61 (2123.72) 9.65 (245.04) 13%
Sidewall Height inches (mm) 4.27 (108.5) 5.81 (147.5) 1.54 (39) 35.9%
Revolutions per mile (km) 856.64 (532.29) 757.8 (470.87) -98.84 (-61.42) -11.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.61 mph (36.39 km/h)
25 mph (40.23 km/h)28.26 mph (45.48 km/h)
30 mph (48.28 km/h)33.91 mph (54.58 km/h)
35 mph (56.33 km/h)39.57 mph (63.67 km/h)
40 mph (64.37 km/h)45.22 mph (72.77 km/h)
45 mph (72.42 km/h)50.87 mph (81.87 km/h)
50 mph (80.47 km/h)56.52 mph (90.96 km/h)
55 mph (88.51 km/h)62.17 mph (100.06 km/h)
60 mph (96.56 km/h)67.83 mph (109.16 km/h)
65 mph (104.61 km/h)73.48 mph (118.25 km/h)
70 mph (112.65 km/h)79.13 mph (127.35 km/h)
75 mph (120.7 km/h)84.78 mph (136.44 km/h)
80 mph (128.75 km/h)90.43 mph (145.54 km/h)
85 mph (136.79 km/h)96.09 mph (154.64 km/h)
90 mph (144.84 km/h)101.74 mph (163.73 km/h)
95 mph (152.89 km/h)107.39 mph (172.83 km/h)
100 mph (160.93 km/h)113.04 mph (181.93 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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