Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/65r16 vs 235/65r16 Tire Comparison Side By Side
  245/65-16 235/65-16 Difference
Diameter inches (mm) 28.54 (724.9) 28.03 (711.9) -0.51 (-13) -1.8%
Width inches (mm) 9.65 (245) 9.25 (235) -0.39 (-10) -4.1%
Circum. inches (mm) 89.66 (2277.34) 88.05 (2236.5) -1.61 (-40.84) -1.8%
Sidewall Height inches (mm) 6.27 (159.25) 6.01 (152.75) -0.26 (-6.5) -4.1%
Revolutions per mile (km) 706.68 (439.11) 719.58 (447.13) 12.9 (8.02) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.64 mph (31.61 km/h)
25 mph (40.23 km/h)24.55 mph (39.51 km/h)
30 mph (48.28 km/h)29.46 mph (47.41 km/h)
35 mph (56.33 km/h)34.37 mph (55.32 km/h)
40 mph (64.37 km/h)39.28 mph (63.22 km/h)
45 mph (72.42 km/h)44.19 mph (71.12 km/h)
50 mph (80.47 km/h)49.1 mph (79.02 km/h)
55 mph (88.51 km/h)54.01 mph (86.93 km/h)
60 mph (96.56 km/h)58.92 mph (94.83 km/h)
65 mph (104.61 km/h)63.83 mph (102.73 km/h)
70 mph (112.65 km/h)68.74 mph (110.63 km/h)
75 mph (120.7 km/h)73.65 mph (118.54 km/h)
80 mph (128.75 km/h)78.57 mph (126.44 km/h)
85 mph (136.79 km/h)83.48 mph (134.34 km/h)
90 mph (144.84 km/h)88.39 mph (142.24 km/h)
95 mph (152.89 km/h)93.3 mph (150.15 km/h)
100 mph (160.93 km/h)98.21 mph (158.05 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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