Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r16 vs 235/60r16 Tire Comparison Side By Side
  245/60-16 235/60-16 Difference
Diameter inches (mm) 27.57 (700.4) 27.1 (688.4) -0.47 (-12) -1.7%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 86.63 (2200.37) 85.14 (2162.67) -1.48 (-37.7) -1.7%
Sidewall Height inches (mm) 5.79 (147) 5.55 (141) -0.24 (-6) -4.1%
Revolutions per mile (km) 731.4 (454.47) 744.15 (462.39) 12.75 (7.92) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.66 mph (31.64 km/h)
25 mph (40.23 km/h)24.57 mph (39.54 km/h)
30 mph (48.28 km/h)29.49 mph (47.45 km/h)
35 mph (56.33 km/h)34.4 mph (55.36 km/h)
40 mph (64.37 km/h)39.31 mph (63.27 km/h)
45 mph (72.42 km/h)44.23 mph (71.18 km/h)
50 mph (80.47 km/h)49.14 mph (79.09 km/h)
55 mph (88.51 km/h)54.06 mph (87 km/h)
60 mph (96.56 km/h)58.97 mph (94.91 km/h)
65 mph (104.61 km/h)63.89 mph (102.82 km/h)
70 mph (112.65 km/h)68.8 mph (110.72 km/h)
75 mph (120.7 km/h)73.72 mph (118.63 km/h)
80 mph (128.75 km/h)78.63 mph (126.54 km/h)
85 mph (136.79 km/h)83.54 mph (134.45 km/h)
90 mph (144.84 km/h)88.46 mph (142.36 km/h)
95 mph (152.89 km/h)93.37 mph (150.27 km/h)
100 mph (160.93 km/h)98.29 mph (158.18 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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