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 225/45r19 Tire Comparison Side By Side
  235/35-19 225/45-19 Difference
Diameter inches (mm) 25.48 (647.1) 26.97 (685.1) 1.5 (38) 5.9%
Width inches (mm) 9.25 (235) 8.86 (225) -0.39 (-10) -4.3%
Circum. inches (mm) 80.04 (2032.92) 84.74 (2152.31) 4.7 (119.38) 5.9%
Sidewall Height inches (mm) 3.24 (82.25) 3.99 (101.25) 0.75 (19) 23.1%
Revolutions per mile (km) 791.64 (491.9) 747.73 (464.62) -43.91 (-27.28) -5.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.17 mph (34.08 km/h)
25 mph (40.23 km/h)26.47 mph (42.6 km/h)
30 mph (48.28 km/h)31.76 mph (51.12 km/h)
35 mph (56.33 km/h)37.06 mph (59.63 km/h)
40 mph (64.37 km/h)42.35 mph (68.15 km/h)
45 mph (72.42 km/h)47.64 mph (76.67 km/h)
50 mph (80.47 km/h)52.94 mph (85.19 km/h)
55 mph (88.51 km/h)58.23 mph (93.71 km/h)
60 mph (96.56 km/h)63.52 mph (102.23 km/h)
65 mph (104.61 km/h)68.82 mph (110.75 km/h)
70 mph (112.65 km/h)74.11 mph (119.27 km/h)
75 mph (120.7 km/h)79.4 mph (127.79 km/h)
80 mph (128.75 km/h)84.7 mph (136.31 km/h)
85 mph (136.79 km/h)89.99 mph (144.83 km/h)
90 mph (144.84 km/h)95.29 mph (153.35 km/h)
95 mph (152.89 km/h)100.58 mph (161.87 km/h)
100 mph (160.93 km/h)105.87 mph (170.39 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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