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 255/40r19 Tire Comparison Side By Side
  265/40-19 255/40-19 Difference
Diameter inches (mm) 27.35 (694.6) 27.03 (686.6) -0.31 (-8) -1.2%
Width inches (mm) 10.43 (265) 10.04 (255) -0.39 (-10) -3.8%
Circum. inches (mm) 85.91 (2182.15) 84.92 (2157.02) -0.99 (-25.13) -1.2%
Sidewall Height inches (mm) 4.17 (106) 4.02 (102) -0.16 (-4) -3.8%
Revolutions per mile (km) 737.5 (458.26) 746.1 (463.6) 8.59 (5.34) 1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.77 mph (31.82 km/h)
25 mph (40.23 km/h)24.71 mph (39.77 km/h)
30 mph (48.28 km/h)29.65 mph (47.72 km/h)
35 mph (56.33 km/h)34.6 mph (55.68 km/h)
40 mph (64.37 km/h)39.54 mph (63.63 km/h)
45 mph (72.42 km/h)44.48 mph (71.59 km/h)
50 mph (80.47 km/h)49.42 mph (79.54 km/h)
55 mph (88.51 km/h)54.37 mph (87.49 km/h)
60 mph (96.56 km/h)59.31 mph (95.45 km/h)
65 mph (104.61 km/h)64.25 mph (103.4 km/h)
70 mph (112.65 km/h)69.19 mph (111.36 km/h)
75 mph (120.7 km/h)74.14 mph (119.31 km/h)
80 mph (128.75 km/h)79.08 mph (127.26 km/h)
85 mph (136.79 km/h)84.02 mph (135.22 km/h)
90 mph (144.84 km/h)88.96 mph (143.17 km/h)
95 mph (152.89 km/h)93.91 mph (151.13 km/h)
100 mph (160.93 km/h)98.85 mph (159.08 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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