Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/55r16 vs 265/50r16 Tire Comparison Side By Side
  255/55-16 265/50-16 Difference
Diameter inches (mm) 27.04 (686.9) 26.43 (671.4) -0.61 (-15.5) -2.3%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 84.96 (2157.96) 83.04 (2109.27) -1.92 (-48.69) -2.3%
Sidewall Height inches (mm) 5.52 (140.25) 5.22 (132.5) -0.31 (-7.75) -5.5%
Revolutions per mile (km) 745.77 (463.4) 762.99 (474.1) 17.22 (10.7) 2.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.55 mph (31.46 km/h)
25 mph (40.23 km/h)24.44 mph (39.33 km/h)
30 mph (48.28 km/h)29.32 mph (47.19 km/h)
35 mph (56.33 km/h)34.21 mph (55.06 km/h)
40 mph (64.37 km/h)39.1 mph (62.92 km/h)
45 mph (72.42 km/h)43.98 mph (70.79 km/h)
50 mph (80.47 km/h)48.87 mph (78.65 km/h)
55 mph (88.51 km/h)53.76 mph (86.52 km/h)
60 mph (96.56 km/h)58.65 mph (94.38 km/h)
65 mph (104.61 km/h)63.53 mph (102.25 km/h)
70 mph (112.65 km/h)68.42 mph (110.11 km/h)
75 mph (120.7 km/h)73.31 mph (117.98 km/h)
80 mph (128.75 km/h)78.19 mph (125.84 km/h)
85 mph (136.79 km/h)83.08 mph (133.71 km/h)
90 mph (144.84 km/h)87.97 mph (141.57 km/h)
95 mph (152.89 km/h)92.86 mph (149.44 km/h)
100 mph (160.93 km/h)97.74 mph (157.3 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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