Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r17 vs 205/55r16 Tire Comparison Side By Side
  225/45-17 205/55-16 Difference
Diameter inches (mm) 24.97 (634.3) 24.88 (631.9) -0.09 (-2.4) -0.4%
Width inches (mm) 8.86 (225) 8.07 (205) -0.79 (-20) -8.9%
Circum. inches (mm) 78.45 (1992.71) 78.16 (1985.17) -0.3 (-7.54) -0.4%
Sidewall Height inches (mm) 3.99 (101.25) 4.44 (112.75) 0.45 (11.5) 11.4%
Revolutions per mile (km) 807.61 (501.83) 810.68 (503.73) 3.07 (1.91) 0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.92 mph (32.07 km/h)
25 mph (40.23 km/h)24.91 mph (40.08 km/h)
30 mph (48.28 km/h)29.89 mph (48.1 km/h)
35 mph (56.33 km/h)34.87 mph (56.11 km/h)
40 mph (64.37 km/h)39.85 mph (64.13 km/h)
45 mph (72.42 km/h)44.83 mph (72.15 km/h)
50 mph (80.47 km/h)49.81 mph (80.16 km/h)
55 mph (88.51 km/h)54.79 mph (88.18 km/h)
60 mph (96.56 km/h)59.77 mph (96.2 km/h)
65 mph (104.61 km/h)64.75 mph (104.21 km/h)
70 mph (112.65 km/h)69.74 mph (112.23 km/h)
75 mph (120.7 km/h)74.72 mph (120.24 km/h)
80 mph (128.75 km/h)79.7 mph (128.26 km/h)
85 mph (136.79 km/h)84.68 mph (136.28 km/h)
90 mph (144.84 km/h)89.66 mph (144.29 km/h)
95 mph (152.89 km/h)94.64 mph (152.31 km/h)
100 mph (160.93 km/h)99.62 mph (160.33 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
20632397258126952818290630023116327534333608374940034284450446444723501354176294
Better Fuel Economy Factory Ratios Increased Power

Most Popular 225/45-R17 Comparisons

To Top