Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/35r18 vs 215/35r19 Tire Comparison Side By Side
  205/35-18 215/35-19 Difference
Diameter inches (mm) 23.65 (600.7) 24.93 (633.1) 1.28 (32.4) 5.4%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 74.3 (1887.15) 78.3 (1988.94) 4.01 (101.79) 5.4%
Sidewall Height inches (mm) 2.82 (71.75) 2.96 (75.25) 0.14 (3.5) 4.9%
Revolutions per mile (km) 852.79 (529.9) 809.15 (502.78) -43.64 (-27.12) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.08 mph (33.92 km/h)
25 mph (40.23 km/h)26.35 mph (42.4 km/h)
30 mph (48.28 km/h)31.62 mph (50.88 km/h)
35 mph (56.33 km/h)36.89 mph (59.37 km/h)
40 mph (64.37 km/h)42.16 mph (67.85 km/h)
45 mph (72.42 km/h)47.43 mph (76.33 km/h)
50 mph (80.47 km/h)52.7 mph (84.81 km/h)
55 mph (88.51 km/h)57.97 mph (93.29 km/h)
60 mph (96.56 km/h)63.24 mph (101.77 km/h)
65 mph (104.61 km/h)68.51 mph (110.25 km/h)
70 mph (112.65 km/h)73.78 mph (118.73 km/h)
75 mph (120.7 km/h)79.05 mph (127.21 km/h)
80 mph (128.75 km/h)84.31 mph (135.69 km/h)
85 mph (136.79 km/h)89.58 mph (144.17 km/h)
90 mph (144.84 km/h)94.85 mph (152.65 km/h)
95 mph (152.89 km/h)100.12 mph (161.13 km/h)
100 mph (160.93 km/h)105.39 mph (169.62 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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