Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r19 vs 245/70r19 Tire Comparison Side By Side
  265/70-19 245/70-19 Difference
Diameter inches (mm) 33.61 (853.6) 32.5 (825.6) -1.1 (-28) -3.3%
Width inches (mm) 10.43 (265) 9.65 (245) -0.79 (-20) -7.5%
Circum. inches (mm) 105.58 (2681.66) 102.11 (2593.7) -3.46 (-87.96) -3.3%
Sidewall Height inches (mm) 7.3 (185.5) 6.75 (171.5) -0.55 (-14) -7.5%
Revolutions per mile (km) 600.13 (372.9) 620.48 (385.55) 20.35 (12.65) 3.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.34 mph (31.13 km/h)
25 mph (40.23 km/h)24.18 mph (38.91 km/h)
30 mph (48.28 km/h)29.02 mph (46.7 km/h)
35 mph (56.33 km/h)33.85 mph (54.48 km/h)
40 mph (64.37 km/h)38.69 mph (62.26 km/h)
45 mph (72.42 km/h)43.52 mph (70.05 km/h)
50 mph (80.47 km/h)48.36 mph (77.83 km/h)
55 mph (88.51 km/h)53.2 mph (85.61 km/h)
60 mph (96.56 km/h)58.03 mph (93.39 km/h)
65 mph (104.61 km/h)62.87 mph (101.18 km/h)
70 mph (112.65 km/h)67.7 mph (108.96 km/h)
75 mph (120.7 km/h)72.54 mph (116.74 km/h)
80 mph (128.75 km/h)77.38 mph (124.52 km/h)
85 mph (136.79 km/h)82.21 mph (132.31 km/h)
90 mph (144.84 km/h)87.05 mph (140.09 km/h)
95 mph (152.89 km/h)91.88 mph (147.87 km/h)
100 mph (160.93 km/h)96.72 mph (155.66 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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