Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/75r17 vs 265/70r17 Tire Comparison Side By Side
  255/75-17 265/70-17 Difference
Diameter inches (mm) 32.06 (814.3) 31.61 (802.8) -0.45 (-11.5) -1.4%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 100.72 (2558.2) 99.29 (2522.07) -1.42 (-36.13) -1.4%
Sidewall Height inches (mm) 7.53 (191.25) 7.3 (185.5) -0.23 (-5.75) -3%
Revolutions per mile (km) 629.09 (390.9) 638.1 (396.5) 9.01 (5.6) 1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.72 mph (31.73 km/h)
25 mph (40.23 km/h)24.65 mph (39.67 km/h)
30 mph (48.28 km/h)29.58 mph (47.6 km/h)
35 mph (56.33 km/h)34.51 mph (55.53 km/h)
40 mph (64.37 km/h)39.44 mph (63.46 km/h)
45 mph (72.42 km/h)44.36 mph (71.4 km/h)
50 mph (80.47 km/h)49.29 mph (79.33 km/h)
55 mph (88.51 km/h)54.22 mph (87.26 km/h)
60 mph (96.56 km/h)59.15 mph (95.2 km/h)
65 mph (104.61 km/h)64.08 mph (103.13 km/h)
70 mph (112.65 km/h)69.01 mph (111.06 km/h)
75 mph (120.7 km/h)73.94 mph (119 km/h)
80 mph (128.75 km/h)78.87 mph (126.93 km/h)
85 mph (136.79 km/h)83.8 mph (134.86 km/h)
90 mph (144.84 km/h)88.73 mph (142.8 km/h)
95 mph (152.89 km/h)93.66 mph (150.73 km/h)
100 mph (160.93 km/h)98.59 mph (158.66 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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