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 255/35r19 Tire Comparison Side By Side
  235/35-19 255/35-19 Difference
Diameter inches (mm) 25.48 (647.1) 26.03 (661.1) 0.55 (14) 2.2%
Width inches (mm) 9.25 (235) 10.04 (255) 0.79 (20) 8.5%
Circum. inches (mm) 80.04 (2032.92) 81.77 (2076.91) 1.73 (43.98) 2.2%
Sidewall Height inches (mm) 3.24 (82.25) 3.51 (89.25) 0.28 (7) 8.5%
Revolutions per mile (km) 791.64 (491.9) 774.88 (481.48) -16.76 (-10.42) -2.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.43 mph (32.88 km/h)
25 mph (40.23 km/h)25.54 mph (41.1 km/h)
30 mph (48.28 km/h)30.65 mph (49.32 km/h)
35 mph (56.33 km/h)35.76 mph (57.55 km/h)
40 mph (64.37 km/h)40.87 mph (65.77 km/h)
45 mph (72.42 km/h)45.97 mph (73.99 km/h)
50 mph (80.47 km/h)51.08 mph (82.21 km/h)
55 mph (88.51 km/h)56.19 mph (90.43 km/h)
60 mph (96.56 km/h)61.3 mph (98.65 km/h)
65 mph (104.61 km/h)66.41 mph (106.87 km/h)
70 mph (112.65 km/h)71.51 mph (115.09 km/h)
75 mph (120.7 km/h)76.62 mph (123.31 km/h)
80 mph (128.75 km/h)81.73 mph (131.53 km/h)
85 mph (136.79 km/h)86.84 mph (139.75 km/h)
90 mph (144.84 km/h)91.95 mph (147.97 km/h)
95 mph (152.89 km/h)97.06 mph (156.2 km/h)
100 mph (160.93 km/h)102.16 mph (164.42 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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