Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
325/35r28 vs 305/35r24 Tire Comparison Side By Side
  325/35-28 305/35-24 Difference
Diameter inches (mm) 36.96 (938.7) 32.41 (823.1) -4.55 (-115.6) -12.3%
Width inches (mm) 12.8 (325) 12.01 (305) -0.79 (-20) -6.2%
Circum. inches (mm) 116.1 (2949.01) 101.8 (2585.84) -14.3 (-363.17) -12.3%
Sidewall Height inches (mm) 4.48 (113.75) 4.2 (106.75) -0.28 (-7) -6.2%
Revolutions per mile (km) 545.72 (339.1) 622.37 (386.72) 76.64 (47.62) 14%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.54 mph (28.22 km/h)
25 mph (40.23 km/h)21.92 mph (35.28 km/h)
30 mph (48.28 km/h)26.31 mph (42.33 km/h)
35 mph (56.33 km/h)30.69 mph (49.39 km/h)
40 mph (64.37 km/h)35.07 mph (56.45 km/h)
45 mph (72.42 km/h)39.46 mph (63.5 km/h)
50 mph (80.47 km/h)43.84 mph (70.56 km/h)
55 mph (88.51 km/h)48.23 mph (77.61 km/h)
60 mph (96.56 km/h)52.61 mph (84.67 km/h)
65 mph (104.61 km/h)57 mph (91.73 km/h)
70 mph (112.65 km/h)61.38 mph (98.78 km/h)
75 mph (120.7 km/h)65.76 mph (105.84 km/h)
80 mph (128.75 km/h)70.15 mph (112.89 km/h)
85 mph (136.79 km/h)74.53 mph (119.95 km/h)
90 mph (144.84 km/h)78.92 mph (127 km/h)
95 mph (152.89 km/h)83.3 mph (134.06 km/h)
100 mph (160.93 km/h)87.69 mph (141.12 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
15841840198120692163223123052393251426352770287830733289345735653626384841584832
Better Fuel Economy Factory Ratios Increased Power

Most Popular 325/35-R28 Comparisons

To Top