Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/55r19 vs 245/35r19 Tire Comparison Side By Side
  235/55-19 245/35-19 Difference
Diameter inches (mm) 29.18 (741.1) 25.75 (654.1) -3.43 (-87) -11.7%
Width inches (mm) 9.25 (235) 9.65 (245) 0.39 (10) 4.3%
Circum. inches (mm) 91.66 (2328.23) 80.9 (2054.92) -10.76 (-273.32) -11.7%
Sidewall Height inches (mm) 5.09 (129.25) 3.38 (85.75) -1.71 (-43.5) -33.7%
Revolutions per mile (km) 691.23 (429.51) 783.17 (486.64) 91.94 (57.13) 13.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.65 mph (28.41 km/h)
25 mph (40.23 km/h)22.07 mph (35.51 km/h)
30 mph (48.28 km/h)26.48 mph (42.61 km/h)
35 mph (56.33 km/h)30.89 mph (49.71 km/h)
40 mph (64.37 km/h)35.3 mph (56.82 km/h)
45 mph (72.42 km/h)39.72 mph (63.92 km/h)
50 mph (80.47 km/h)44.13 mph (71.02 km/h)
55 mph (88.51 km/h)48.54 mph (78.12 km/h)
60 mph (96.56 km/h)52.96 mph (85.23 km/h)
65 mph (104.61 km/h)57.37 mph (92.33 km/h)
70 mph (112.65 km/h)61.78 mph (99.43 km/h)
75 mph (120.7 km/h)66.2 mph (106.53 km/h)
80 mph (128.75 km/h)70.61 mph (113.63 km/h)
85 mph (136.79 km/h)75.02 mph (120.74 km/h)
90 mph (144.84 km/h)79.43 mph (127.84 km/h)
95 mph (152.89 km/h)83.85 mph (134.94 km/h)
100 mph (160.93 km/h)88.26 mph (142.04 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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