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 275/45r22 Tire Comparison Side By Side
  305/40-23 275/45-22 Difference
Diameter inches (mm) 32.61 (828.2) 31.74 (806.3) -0.86 (-21.9) -2.6%
Width inches (mm) 12.01 (305) 10.83 (275) -1.18 (-30) -9.8%
Circum. inches (mm) 102.44 (2601.87) 99.73 (2533.07) -2.71 (-68.8) -2.6%
Sidewall Height inches (mm) 4.8 (122) 4.87 (123.75) 0.07 (1.75) 1.4%
Revolutions per mile (km) 618.53 (384.34) 635.33 (394.78) 16.8 (10.44) 2.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.47 mph (31.34 km/h)
25 mph (40.23 km/h)24.34 mph (39.17 km/h)
30 mph (48.28 km/h)29.21 mph (47 km/h)
35 mph (56.33 km/h)34.07 mph (54.84 km/h)
40 mph (64.37 km/h)38.94 mph (62.67 km/h)
45 mph (72.42 km/h)43.81 mph (70.51 km/h)
50 mph (80.47 km/h)48.68 mph (78.34 km/h)
55 mph (88.51 km/h)53.55 mph (86.17 km/h)
60 mph (96.56 km/h)58.41 mph (94.01 km/h)
65 mph (104.61 km/h)63.28 mph (101.84 km/h)
70 mph (112.65 km/h)68.15 mph (109.68 km/h)
75 mph (120.7 km/h)73.02 mph (117.51 km/h)
80 mph (128.75 km/h)77.88 mph (125.34 km/h)
85 mph (136.79 km/h)82.75 mph (133.18 km/h)
90 mph (144.84 km/h)87.62 mph (141.01 km/h)
95 mph (152.89 km/h)92.49 mph (148.85 km/h)
100 mph (160.93 km/h)97.36 mph (156.68 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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