Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/45r22 vs 285/55r22 Tire Comparison Side By Side
  305/45-22 285/55-22 Difference
Diameter inches (mm) 32.81 (833.3) 34.34 (872.3) 1.54 (39) 4.7%
Width inches (mm) 12.01 (305) 11.22 (285) -0.79 (-20) -6.6%
Circum. inches (mm) 103.07 (2617.89) 107.89 (2740.41) 4.82 (122.52) 4.7%
Sidewall Height inches (mm) 5.4 (137.25) 6.17 (156.75) 0.77 (19.5) 14.2%
Revolutions per mile (km) 614.75 (381.99) 587.26 (364.91) -27.49 (-17.08) -4.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.94 mph (33.69 km/h)
25 mph (40.23 km/h)26.17 mph (42.12 km/h)
30 mph (48.28 km/h)31.4 mph (50.54 km/h)
35 mph (56.33 km/h)36.64 mph (58.96 km/h)
40 mph (64.37 km/h)41.87 mph (67.39 km/h)
45 mph (72.42 km/h)47.11 mph (75.81 km/h)
50 mph (80.47 km/h)52.34 mph (84.23 km/h)
55 mph (88.51 km/h)57.57 mph (92.66 km/h)
60 mph (96.56 km/h)62.81 mph (101.08 km/h)
65 mph (104.61 km/h)68.04 mph (109.5 km/h)
70 mph (112.65 km/h)73.28 mph (117.93 km/h)
75 mph (120.7 km/h)78.51 mph (126.35 km/h)
80 mph (128.75 km/h)83.74 mph (134.77 km/h)
85 mph (136.79 km/h)88.98 mph (143.2 km/h)
90 mph (144.84 km/h)94.21 mph (151.62 km/h)
95 mph (152.89 km/h)99.45 mph (160.04 km/h)
100 mph (160.93 km/h)104.68 mph (168.47 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
14941736187019522041210521752258237224872614271529003103326233643421363139244560
Better Fuel Economy Factory Ratios Increased Power

Most Popular 305/45-R22 Comparisons

To Top