Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/35r19 vs 235/40r19 Tire Comparison Side By Side
  235/35-19 235/40-19 Difference
Diameter inches (mm) 25.48 (647.1) 26.4 (670.6) 0.93 (23.5) 3.6%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 80.04 (2032.92) 82.94 (2106.75) 2.91 (73.83) 3.6%
Sidewall Height inches (mm) 3.24 (82.25) 3.7 (94) 0.46 (11.75) 14.3%
Revolutions per mile (km) 791.64 (491.9) 763.9 (474.66) -27.74 (-17.24) -3.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.73 mph (33.36 km/h)
25 mph (40.23 km/h)25.91 mph (41.69 km/h)
30 mph (48.28 km/h)31.09 mph (50.03 km/h)
35 mph (56.33 km/h)36.27 mph (58.37 km/h)
40 mph (64.37 km/h)41.45 mph (66.71 km/h)
45 mph (72.42 km/h)46.63 mph (75.05 km/h)
50 mph (80.47 km/h)51.82 mph (83.39 km/h)
55 mph (88.51 km/h)57 mph (91.73 km/h)
60 mph (96.56 km/h)62.18 mph (100.07 km/h)
65 mph (104.61 km/h)67.36 mph (108.41 km/h)
70 mph (112.65 km/h)72.54 mph (116.75 km/h)
75 mph (120.7 km/h)77.72 mph (125.08 km/h)
80 mph (128.75 km/h)82.91 mph (133.42 km/h)
85 mph (136.79 km/h)88.09 mph (141.76 km/h)
90 mph (144.84 km/h)93.27 mph (150.1 km/h)
95 mph (152.89 km/h)98.45 mph (158.44 km/h)
100 mph (160.93 km/h)103.63 mph (166.78 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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