Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/45r19 vs 235/35r19 Tire Comparison Side By Side
  235/45-19 235/35-19 Difference
Diameter inches (mm) 27.33 (694.1) 25.48 (647.1) -1.85 (-47) -6.8%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 85.85 (2180.58) 80.04 (2032.92) -5.81 (-147.65) -6.8%
Sidewall Height inches (mm) 4.16 (105.75) 3.24 (82.25) -0.93 (-23.5) -22.2%
Revolutions per mile (km) 738.04 (458.59) 791.64 (491.9) 53.6 (33.31) 7.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.65 mph (30.01 km/h)
25 mph (40.23 km/h)23.31 mph (37.51 km/h)
30 mph (48.28 km/h)27.97 mph (45.01 km/h)
35 mph (56.33 km/h)32.63 mph (52.51 km/h)
40 mph (64.37 km/h)37.29 mph (60.01 km/h)
45 mph (72.42 km/h)41.95 mph (67.52 km/h)
50 mph (80.47 km/h)46.61 mph (75.02 km/h)
55 mph (88.51 km/h)51.28 mph (82.52 km/h)
60 mph (96.56 km/h)55.94 mph (90.02 km/h)
65 mph (104.61 km/h)60.6 mph (97.52 km/h)
70 mph (112.65 km/h)65.26 mph (105.03 km/h)
75 mph (120.7 km/h)69.92 mph (112.53 km/h)
80 mph (128.75 km/h)74.58 mph (120.03 km/h)
85 mph (136.79 km/h)79.24 mph (127.53 km/h)
90 mph (144.84 km/h)83.91 mph (135.03 km/h)
95 mph (152.89 km/h)88.57 mph (142.54 km/h)
100 mph (160.93 km/h)93.23 mph (150.04 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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