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 265/35r19 Tire Comparison Side By Side
  265/40-19 265/35-19 Difference
Diameter inches (mm) 27.35 (694.6) 26.3 (668.1) -1.04 (-26.5) -3.8%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 85.91 (2182.15) 82.63 (2098.9) -3.28 (-83.25) -3.8%
Sidewall Height inches (mm) 4.17 (106) 3.65 (92.75) -0.52 (-13.25) -12.5%
Revolutions per mile (km) 737.5 (458.26) 766.76 (476.44) 29.25 (18.18) 4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.24 mph (30.96 km/h)
25 mph (40.23 km/h)24.05 mph (38.7 km/h)
30 mph (48.28 km/h)28.86 mph (46.44 km/h)
35 mph (56.33 km/h)33.66 mph (54.18 km/h)
40 mph (64.37 km/h)38.47 mph (61.92 km/h)
45 mph (72.42 km/h)43.28 mph (69.66 km/h)
50 mph (80.47 km/h)48.09 mph (77.4 km/h)
55 mph (88.51 km/h)52.9 mph (85.14 km/h)
60 mph (96.56 km/h)57.71 mph (92.88 km/h)
65 mph (104.61 km/h)62.52 mph (100.62 km/h)
70 mph (112.65 km/h)67.33 mph (108.36 km/h)
75 mph (120.7 km/h)72.14 mph (116.1 km/h)
80 mph (128.75 km/h)76.95 mph (123.84 km/h)
85 mph (136.79 km/h)81.76 mph (131.58 km/h)
90 mph (144.84 km/h)86.57 mph (139.32 km/h)
95 mph (152.89 km/h)91.38 mph (147.06 km/h)
100 mph (160.93 km/h)96.18 mph (154.79 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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