Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r19 vs 245/45r19 Tire Comparison Side By Side
  225/45-19 245/45-19 Difference
Diameter inches (mm) 26.97 (685.1) 27.68 (703.1) 0.71 (18) 2.6%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 84.74 (2152.31) 86.96 (2208.85) 2.23 (56.55) 2.6%
Sidewall Height inches (mm) 3.99 (101.25) 4.34 (110.25) 0.35 (9) 8.9%
Revolutions per mile (km) 747.73 (464.62) 728.59 (452.72) -19.14 (-11.89) -2.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.53 mph (33.03 km/h)
25 mph (40.23 km/h)25.66 mph (41.29 km/h)
30 mph (48.28 km/h)30.79 mph (49.55 km/h)
35 mph (56.33 km/h)35.92 mph (57.81 km/h)
40 mph (64.37 km/h)41.05 mph (66.07 km/h)
45 mph (72.42 km/h)46.18 mph (74.32 km/h)
50 mph (80.47 km/h)51.31 mph (82.58 km/h)
55 mph (88.51 km/h)56.45 mph (90.84 km/h)
60 mph (96.56 km/h)61.58 mph (99.1 km/h)
65 mph (104.61 km/h)66.71 mph (107.36 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
18542154232024222533261226982801294330853243336935983850404741744245450548685657
Better Fuel Economy Factory Ratios Increased Power

Most Popular 225/45-R19 Comparisons

To Top