Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/75r14 vs 235/75r14 Tire Comparison Side By Side
  215/75-14 235/75-14 Difference
Diameter inches (mm) 26.7 (678.1) 27.88 (708.1) 1.18 (30) 4.4%
Width inches (mm) 8.46 (215) 9.25 (235) 0.79 (20) 9.3%
Circum. inches (mm) 83.87 (2130.31) 87.58 (2224.56) 3.71 (94.25) 4.4%
Sidewall Height inches (mm) 6.35 (161.25) 6.94 (176.25) 0.59 (15) 9.3%
Revolutions per mile (km) 755.45 (469.41) 723.44 (449.53) -32.01 (-19.89) -4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.88 mph (33.61 km/h)
25 mph (40.23 km/h)26.11 mph (42.01 km/h)
30 mph (48.28 km/h)31.33 mph (50.42 km/h)
35 mph (56.33 km/h)36.55 mph (58.82 km/h)
40 mph (64.37 km/h)41.77 mph (67.22 km/h)
45 mph (72.42 km/h)46.99 mph (75.62 km/h)
50 mph (80.47 km/h)52.21 mph (84.03 km/h)
55 mph (88.51 km/h)57.43 mph (92.43 km/h)
60 mph (96.56 km/h)62.65 mph (100.83 km/h)
65 mph (104.61 km/h)67.88 mph (109.24 km/h)
70 mph (112.65 km/h)73.1 mph (117.64 km/h)
75 mph (120.7 km/h)78.32 mph (126.04 km/h)
80 mph (128.75 km/h)83.54 mph (134.44 km/h)
85 mph (136.79 km/h)88.76 mph (142.85 km/h)
90 mph (144.84 km/h)93.98 mph (151.25 km/h)
95 mph (152.89 km/h)99.2 mph (159.65 km/h)
100 mph (160.93 km/h)104.42 mph (168.05 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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