Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/45r17 vs 225/55r17 Tire Comparison Side By Side
  245/45-17 225/55-17 Difference
Diameter inches (mm) 25.68 (652.3) 26.74 (679.3) 1.06 (27) 4.1%
Width inches (mm) 9.65 (245) 8.86 (225) -0.79 (-20) -8.2%
Circum. inches (mm) 80.68 (2049.26) 84.02 (2134.08) 3.34 (84.82) 4.1%
Sidewall Height inches (mm) 4.34 (110.25) 4.87 (123.75) 0.53 (13.5) 12.2%
Revolutions per mile (km) 785.33 (487.98) 754.11 (468.58) -31.21 (-19.4) -4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.83 mph (33.52 km/h)
25 mph (40.23 km/h)26.03 mph (41.9 km/h)
30 mph (48.28 km/h)31.24 mph (50.28 km/h)
35 mph (56.33 km/h)36.45 mph (58.66 km/h)
40 mph (64.37 km/h)41.66 mph (67.04 km/h)
45 mph (72.42 km/h)46.86 mph (75.42 km/h)
50 mph (80.47 km/h)52.07 mph (83.8 km/h)
55 mph (88.51 km/h)57.28 mph (92.18 km/h)
60 mph (96.56 km/h)62.48 mph (100.56 km/h)
65 mph (104.61 km/h)67.69 mph (108.94 km/h)
70 mph (112.65 km/h)72.9 mph (117.32 km/h)
75 mph (120.7 km/h)78.1 mph (125.7 km/h)
80 mph (128.75 km/h)83.31 mph (134.08 km/h)
85 mph (136.79 km/h)88.52 mph (142.46 km/h)
90 mph (144.84 km/h)93.73 mph (150.84 km/h)
95 mph (152.89 km/h)98.93 mph (159.22 km/h)
100 mph (160.93 km/h)104.14 mph (167.6 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
19192229240125072621270327932899304631933356348737243985418943204393466350395855
Better Fuel Economy Factory Ratios Increased Power

Most Popular 245/45-R17 Comparisons

To Top