Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/40r19 vs 285/35r19 Tire Comparison Side By Side
  265/40-19 285/35-19 Difference
Diameter inches (mm) 27.35 (694.6) 26.85 (682.1) -0.49 (-12.5) -1.8%
Width inches (mm) 10.43 (265) 11.22 (285) 0.79 (20) 7.5%
Circum. inches (mm) 85.91 (2182.15) 84.37 (2142.88) -1.55 (-39.27) -1.8%
Sidewall Height inches (mm) 4.17 (106) 3.93 (99.75) -0.25 (-6.25) -5.9%
Revolutions per mile (km) 737.5 (458.26) 751.02 (466.66) 13.52 (8.4) 1.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.64 mph (31.61 km/h)
25 mph (40.23 km/h)24.55 mph (39.51 km/h)
30 mph (48.28 km/h)29.46 mph (47.41 km/h)
35 mph (56.33 km/h)34.37 mph (55.31 km/h)
40 mph (64.37 km/h)39.28 mph (63.22 km/h)
45 mph (72.42 km/h)44.19 mph (71.12 km/h)
50 mph (80.47 km/h)49.1 mph (79.02 km/h)
55 mph (88.51 km/h)54.01 mph (86.92 km/h)
60 mph (96.56 km/h)58.92 mph (94.82 km/h)
65 mph (104.61 km/h)63.83 mph (102.73 km/h)
70 mph (112.65 km/h)68.74 mph (110.63 km/h)
75 mph (120.7 km/h)73.65 mph (118.53 km/h)
80 mph (128.75 km/h)78.56 mph (126.43 km/h)
85 mph (136.79 km/h)83.47 mph (134.33 km/h)
90 mph (144.84 km/h)88.38 mph (142.23 km/h)
95 mph (152.89 km/h)93.29 mph (150.14 km/h)
100 mph (160.93 km/h)98.2 mph (158.04 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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