Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/65r17 vs 285/60r17 Tire Comparison Side By Side
  275/65-17 285/60-17 Difference
Diameter inches (mm) 31.07 (789.3) 30.46 (773.8) -0.61 (-15.5) -2%
Width inches (mm) 10.83 (275) 11.22 (285) 0.39 (10) 3.6%
Circum. inches (mm) 97.62 (2479.66) 95.71 (2430.96) -1.92 (-48.69) -2%
Sidewall Height inches (mm) 7.04 (178.75) 6.73 (171) -0.31 (-7.75) -4.3%
Revolutions per mile (km) 649.02 (403.28) 662.02 (411.36) 13 (8.08) 2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.61 mph (31.55 km/h)
25 mph (40.23 km/h)24.51 mph (39.44 km/h)
30 mph (48.28 km/h)29.41 mph (47.33 km/h)
35 mph (56.33 km/h)34.31 mph (55.22 km/h)
40 mph (64.37 km/h)39.21 mph (63.11 km/h)
45 mph (72.42 km/h)44.12 mph (71 km/h)
50 mph (80.47 km/h)49.02 mph (78.89 km/h)
55 mph (88.51 km/h)53.92 mph (86.78 km/h)
60 mph (96.56 km/h)58.82 mph (94.66 km/h)
65 mph (104.61 km/h)63.72 mph (102.55 km/h)
70 mph (112.65 km/h)68.63 mph (110.44 km/h)
75 mph (120.7 km/h)73.53 mph (118.33 km/h)
80 mph (128.75 km/h)78.43 mph (126.22 km/h)
85 mph (136.79 km/h)83.33 mph (134.11 km/h)
90 mph (144.84 km/h)88.23 mph (142 km/h)
95 mph (152.89 km/h)93.13 mph (149.89 km/h)
100 mph (160.93 km/h)98.04 mph (157.77 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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