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 265/75r16 Tire Comparison Side By Side
  255/55-16 265/75-16 Difference
Diameter inches (mm) 27.04 (686.9) 31.65 (803.9) 4.61 (117) 17%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 84.96 (2157.96) 99.43 (2525.53) 14.47 (367.57) 17%
Sidewall Height inches (mm) 5.52 (140.25) 7.82 (198.75) 2.3 (58.5) 41.7%
Revolutions per mile (km) 745.77 (463.4) 637.23 (395.96) -108.54 (-67.44) -14.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.41 mph (37.67 km/h)
25 mph (40.23 km/h)29.26 mph (47.09 km/h)
30 mph (48.28 km/h)35.11 mph (56.5 km/h)
35 mph (56.33 km/h)40.96 mph (65.92 km/h)
40 mph (64.37 km/h)46.81 mph (75.34 km/h)
45 mph (72.42 km/h)52.66 mph (84.76 km/h)
50 mph (80.47 km/h)58.52 mph (94.17 km/h)
55 mph (88.51 km/h)64.37 mph (103.59 km/h)
60 mph (96.56 km/h)70.22 mph (113.01 km/h)
65 mph (104.61 km/h)76.07 mph (122.43 km/h)
70 mph (112.65 km/h)81.92 mph (131.84 km/h)
75 mph (120.7 km/h)87.77 mph (141.26 km/h)
80 mph (128.75 km/h)93.63 mph (150.68 km/h)
85 mph (136.79 km/h)99.48 mph (160.09 km/h)
90 mph (144.84 km/h)105.33 mph (169.51 km/h)
95 mph (152.89 km/h)111.18 mph (178.93 km/h)
100 mph (160.93 km/h)117.03 mph (188.35 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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