Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/55r22 vs 305/60r22 Tire Comparison Side By Side
  305/55-22 305/60-22 Difference
Diameter inches (mm) 35.21 (894.3) 36.41 (924.8) 1.2 (30.5) 3.4%
Width inches (mm) 12.01 (305) 12.01 (305) 0 (0) 0%
Circum. inches (mm) 110.61 (2809.53) 114.38 (2905.34) 3.77 (95.82) 3.4%
Sidewall Height inches (mm) 6.6 (167.75) 7.2 (183) 0.6 (15.25) 9.1%
Revolutions per mile (km) 572.82 (355.93) 553.93 (344.19) -18.89 (-11.74) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.68 mph (33.28 km/h)
25 mph (40.23 km/h)25.85 mph (41.61 km/h)
30 mph (48.28 km/h)31.02 mph (49.93 km/h)
35 mph (56.33 km/h)36.19 mph (58.25 km/h)
40 mph (64.37 km/h)41.36 mph (66.57 km/h)
45 mph (72.42 km/h)46.53 mph (74.89 km/h)
50 mph (80.47 km/h)51.71 mph (83.21 km/h)
55 mph (88.51 km/h)56.88 mph (91.53 km/h)
60 mph (96.56 km/h)62.05 mph (99.85 km/h)
65 mph (104.61 km/h)67.22 mph (108.18 km/h)
70 mph (112.65 km/h)72.39 mph (116.5 km/h)
75 mph (120.7 km/h)77.56 mph (124.82 km/h)
80 mph (128.75 km/h)82.73 mph (133.14 km/h)
85 mph (136.79 km/h)87.9 mph (141.46 km/h)
90 mph (144.84 km/h)93.07 mph (149.78 km/h)
95 mph (152.89 km/h)98.24 mph (158.1 km/h)
100 mph (160.93 km/h)103.41 mph (166.42 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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