Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/30r19 vs 275/35r19 Tire Comparison Side By Side
  245/30-19 275/35-19 Difference
Diameter inches (mm) 24.79 (629.6) 26.58 (675.1) 1.79 (45.5) 7.2%
Width inches (mm) 9.65 (245) 10.83 (275) 1.18 (30) 12.2%
Circum. inches (mm) 77.87 (1977.95) 83.5 (2120.89) 5.63 (142.94) 7.2%
Sidewall Height inches (mm) 2.89 (73.5) 3.79 (96.25) 0.9 (22.75) 31%
Revolutions per mile (km) 813.64 (505.57) 758.81 (471.5) -54.84 (-34.07) -6.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.45 mph (34.51 km/h)
25 mph (40.23 km/h)26.81 mph (43.14 km/h)
30 mph (48.28 km/h)32.17 mph (51.77 km/h)
35 mph (56.33 km/h)37.53 mph (60.4 km/h)
40 mph (64.37 km/h)42.89 mph (69.03 km/h)
45 mph (72.42 km/h)48.25 mph (77.65 km/h)
50 mph (80.47 km/h)53.61 mph (86.28 km/h)
55 mph (88.51 km/h)58.97 mph (94.91 km/h)
60 mph (96.56 km/h)64.34 mph (103.54 km/h)
65 mph (104.61 km/h)69.7 mph (112.17 km/h)
70 mph (112.65 km/h)75.06 mph (120.8 km/h)
75 mph (120.7 km/h)80.42 mph (129.42 km/h)
80 mph (128.75 km/h)85.78 mph (138.05 km/h)
85 mph (136.79 km/h)91.14 mph (146.68 km/h)
90 mph (144.84 km/h)96.5 mph (155.31 km/h)
95 mph (152.89 km/h)101.87 mph (163.94 km/h)
100 mph (160.93 km/h)107.23 mph (172.57 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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