Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r17 vs 235/60r17 Tire Comparison Side By Side
  245/60-17 235/60-17 Difference
Diameter inches (mm) 28.57 (725.8) 28.1 (713.8) -0.47 (-12) -1.7%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 89.77 (2280.17) 88.29 (2242.47) -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) 705.8 (438.56) 717.67 (445.94) 11.87 (7.37) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.67 mph (31.65 km/h)
25 mph (40.23 km/h)24.59 mph (39.57 km/h)
30 mph (48.28 km/h)29.5 mph (47.48 km/h)
35 mph (56.33 km/h)34.42 mph (55.4 km/h)
40 mph (64.37 km/h)39.34 mph (63.31 km/h)
45 mph (72.42 km/h)44.26 mph (71.22 km/h)
50 mph (80.47 km/h)49.17 mph (79.14 km/h)
55 mph (88.51 km/h)54.09 mph (87.05 km/h)
60 mph (96.56 km/h)59.01 mph (94.96 km/h)
65 mph (104.61 km/h)63.93 mph (102.88 km/h)
70 mph (112.65 km/h)68.84 mph (110.79 km/h)
75 mph (120.7 km/h)73.76 mph (118.71 km/h)
80 mph (128.75 km/h)78.68 mph (126.62 km/h)
85 mph (136.79 km/h)83.59 mph (134.53 km/h)
90 mph (144.84 km/h)88.51 mph (142.45 km/h)
95 mph (152.89 km/h)93.43 mph (150.36 km/h)
100 mph (160.93 km/h)98.35 mph (158.27 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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