Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/60r17 vs 255/75r17 Tire Comparison Side By Side
  275/60-17 255/75-17 Difference
Diameter inches (mm) 29.99 (761.8) 32.06 (814.3) 2.07 (52.5) 6.9%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 94.22 (2393.27) 100.72 (2558.2) 6.49 (164.93) 6.9%
Sidewall Height inches (mm) 6.5 (165) 7.53 (191.25) 1.03 (26.25) 15.9%
Revolutions per mile (km) 672.45 (417.84) 629.09 (390.9) -43.35 (-26.94) -6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.38 mph (34.41 km/h)
25 mph (40.23 km/h)26.72 mph (43.01 km/h)
30 mph (48.28 km/h)32.07 mph (51.61 km/h)
35 mph (56.33 km/h)37.41 mph (60.21 km/h)
40 mph (64.37 km/h)42.76 mph (68.81 km/h)
45 mph (72.42 km/h)48.1 mph (77.41 km/h)
50 mph (80.47 km/h)53.45 mph (86.01 km/h)
55 mph (88.51 km/h)58.79 mph (94.61 km/h)
60 mph (96.56 km/h)64.13 mph (103.22 km/h)
65 mph (104.61 km/h)69.48 mph (111.82 km/h)
70 mph (112.65 km/h)74.82 mph (120.42 km/h)
75 mph (120.7 km/h)80.17 mph (129.02 km/h)
80 mph (128.75 km/h)85.51 mph (137.62 km/h)
85 mph (136.79 km/h)90.86 mph (146.22 km/h)
90 mph (144.84 km/h)96.2 mph (154.82 km/h)
95 mph (152.89 km/h)101.55 mph (163.42 km/h)
100 mph (160.93 km/h)106.89 mph (172.03 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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