Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/40r23 vs 285/55r22 Tire Comparison Side By Side
  305/40-23 285/55-22 Difference
Diameter inches (mm) 32.61 (828.2) 34.34 (872.3) 1.74 (44.1) 5.3%
Width inches (mm) 12.01 (305) 11.22 (285) -0.79 (-20) -6.6%
Circum. inches (mm) 102.44 (2601.87) 107.89 (2740.41) 5.45 (138.54) 5.3%
Sidewall Height inches (mm) 4.8 (122) 6.17 (156.75) 1.37 (34.75) 28.5%
Revolutions per mile (km) 618.53 (384.34) 587.26 (364.91) -31.27 (-19.43) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.06 mph (33.9 km/h)
25 mph (40.23 km/h)26.33 mph (42.38 km/h)
30 mph (48.28 km/h)31.6 mph (50.85 km/h)
35 mph (56.33 km/h)36.86 mph (59.33 km/h)
40 mph (64.37 km/h)42.13 mph (67.8 km/h)
45 mph (72.42 km/h)47.4 mph (76.28 km/h)
50 mph (80.47 km/h)52.66 mph (84.75 km/h)
55 mph (88.51 km/h)57.93 mph (93.23 km/h)
60 mph (96.56 km/h)63.19 mph (101.7 km/h)
65 mph (104.61 km/h)68.46 mph (110.18 km/h)
70 mph (112.65 km/h)73.73 mph (118.65 km/h)
75 mph (120.7 km/h)78.99 mph (127.13 km/h)
80 mph (128.75 km/h)84.26 mph (135.6 km/h)
85 mph (136.79 km/h)89.53 mph (144.08 km/h)
90 mph (144.84 km/h)94.79 mph (152.55 km/h)
95 mph (152.89 km/h)100.06 mph (161.03 km/h)
100 mph (160.93 km/h)105.32 mph (169.5 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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