Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/60r19 vs 265/60r18 Tire Comparison Side By Side
  255/60-19 265/60-18 Difference
Diameter inches (mm) 31.05 (788.6) 30.52 (775.2) -0.53 (-13.4) -1.7%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 97.54 (2477.46) 95.88 (2435.36) -1.66 (-42.1) -1.7%
Sidewall Height inches (mm) 6.02 (153) 6.26 (159) 0.24 (6) 3.9%
Revolutions per mile (km) 649.59 (403.64) 660.82 (410.62) 11.23 (6.98) 1.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.66 mph (31.64 km/h)
25 mph (40.23 km/h)24.58 mph (39.55 km/h)
30 mph (48.28 km/h)29.49 mph (47.46 km/h)
35 mph (56.33 km/h)34.41 mph (55.37 km/h)
40 mph (64.37 km/h)39.32 mph (63.28 km/h)
45 mph (72.42 km/h)44.24 mph (71.19 km/h)
50 mph (80.47 km/h)49.15 mph (79.1 km/h)
55 mph (88.51 km/h)54.07 mph (87.01 km/h)
60 mph (96.56 km/h)58.98 mph (94.92 km/h)
65 mph (104.61 km/h)63.9 mph (102.83 km/h)
70 mph (112.65 km/h)68.81 mph (110.74 km/h)
75 mph (120.7 km/h)73.73 mph (118.65 km/h)
80 mph (128.75 km/h)78.64 mph (126.56 km/h)
85 mph (136.79 km/h)83.56 mph (134.47 km/h)
90 mph (144.84 km/h)88.47 mph (142.38 km/h)
95 mph (152.89 km/h)93.39 mph (150.29 km/h)
100 mph (160.93 km/h)98.3 mph (158.2 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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