Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/50r19 vs 245/50r19 Tire Comparison Side By Side
  235/50-19 245/50-19 Difference
Diameter inches (mm) 28.25 (717.6) 28.65 (727.6) 0.39 (10) 1.4%
Width inches (mm) 9.25 (235) 9.65 (245) 0.39 (10) 4.3%
Circum. inches (mm) 88.76 (2254.41) 89.99 (2285.82) 1.24 (31.42) 1.4%
Sidewall Height inches (mm) 4.63 (117.5) 4.82 (122.5) 0.2 (5) 4.3%
Revolutions per mile (km) 713.87 (443.57) 704.05 (437.48) -9.81 (-6.1) -1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.28 mph (32.64 km/h)
25 mph (40.23 km/h)25.35 mph (40.79 km/h)
30 mph (48.28 km/h)30.42 mph (48.95 km/h)
35 mph (56.33 km/h)35.49 mph (57.11 km/h)
40 mph (64.37 km/h)40.56 mph (65.27 km/h)
45 mph (72.42 km/h)45.63 mph (73.43 km/h)
50 mph (80.47 km/h)50.7 mph (81.59 km/h)
55 mph (88.51 km/h)55.77 mph (89.75 km/h)
60 mph (96.56 km/h)60.84 mph (97.91 km/h)
65 mph (104.61 km/h)65.91 mph (106.07 km/h)
70 mph (112.65 km/h)70.98 mph (114.22 km/h)
75 mph (120.7 km/h)76.05 mph (122.38 km/h)
80 mph (128.75 km/h)81.11 mph (130.54 km/h)
85 mph (136.79 km/h)86.18 mph (138.7 km/h)
90 mph (144.84 km/h)91.25 mph (146.86 km/h)
95 mph (152.89 km/h)96.32 mph (155.02 km/h)
100 mph (160.93 km/h)101.39 mph (163.18 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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