Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/70r19.5 vs 245/70r19.5 Tire Comparison Side By Side
  225/70-19.5 245/70-19.5 Difference
Diameter inches (mm) 31.9 (810.3) 33 (838.3) 1.1 (28) 3.5%
Width inches (mm) 8.86 (225) 9.65 (245) 0.79 (20) 8.9%
Circum. inches (mm) 100.22 (2545.63) 103.68 (2633.6) 3.46 (87.96) 3.5%
Sidewall Height inches (mm) 6.2 (157.5) 6.75 (171.5) 0.55 (14) 8.9%
Revolutions per mile (km) 632.2 (392.83) 611.08 (379.71) -21.12 (-13.12) -3.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.69 mph (33.3 km/h)
25 mph (40.23 km/h)25.86 mph (41.62 km/h)
30 mph (48.28 km/h)31.04 mph (49.95 km/h)
35 mph (56.33 km/h)36.21 mph (58.27 km/h)
40 mph (64.37 km/h)41.38 mph (66.6 km/h)
45 mph (72.42 km/h)46.55 mph (74.92 km/h)
50 mph (80.47 km/h)51.73 mph (83.25 km/h)
55 mph (88.51 km/h)56.9 mph (91.57 km/h)
60 mph (96.56 km/h)62.07 mph (99.9 km/h)
65 mph (104.61 km/h)67.25 mph (108.22 km/h)
70 mph (112.65 km/h)72.42 mph (116.55 km/h)
75 mph (120.7 km/h)77.59 mph (124.87 km/h)
80 mph (128.75 km/h)82.76 mph (133.2 km/h)
85 mph (136.79 km/h)87.94 mph (141.52 km/h)
90 mph (144.84 km/h)93.11 mph (149.85 km/h)
95 mph (152.89 km/h)98.28 mph (158.17 km/h)
100 mph (160.93 km/h)103.46 mph (166.5 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
15551807194620322124219022632349246825872720282630183229339535013560377940834745
Better Fuel Economy Factory Ratios Increased Power

Most Popular 225/70-R19.5 Comparisons

To Top