Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
225/45r15 vs 225/45r16 Tire Comparison Side By Side
  225/45-15 225/45-16 Difference
Diameter inches (mm) 22.97 (583.5) 23.97 (608.9) 1 (25.4) 4.4%
Width inches (mm) 8.86 (225) 8.86 (225) 0 (0) 0%
Circum. inches (mm) 72.17 (1833.12) 75.31 (1912.92) 3.14 (79.8) 4.4%
Sidewall Height inches (mm) 3.99 (101.25) 3.99 (101.25) 0 (0) 0%
Revolutions per mile (km) 877.93 (545.52) 841.3 (522.76) -36.62 (-22.76) -4.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.87 mph (33.59 km/h)
25 mph (40.23 km/h)26.09 mph (41.99 km/h)
30 mph (48.28 km/h)31.31 mph (50.38 km/h)
35 mph (56.33 km/h)36.52 mph (58.78 km/h)
40 mph (64.37 km/h)41.74 mph (67.18 km/h)
45 mph (72.42 km/h)46.96 mph (75.57 km/h)
50 mph (80.47 km/h)52.18 mph (83.97 km/h)
55 mph (88.51 km/h)57.39 mph (92.37 km/h)
60 mph (96.56 km/h)62.61 mph (100.76 km/h)
65 mph (104.61 km/h)67.83 mph (109.16 km/h)
70 mph (112.65 km/h)73.05 mph (117.56 km/h)
75 mph (120.7 km/h)78.26 mph (125.96 km/h)
80 mph (128.75 km/h)83.48 mph (134.35 km/h)
85 mph (136.79 km/h)88.7 mph (142.75 km/h)
90 mph (144.84 km/h)93.92 mph (151.15 km/h)
95 mph (152.89 km/h)99.14 mph (159.54 km/h)
100 mph (160.93 km/h)104.35 mph (167.94 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
21412487267827972924301631163234339835623744389041544446467448194901520256216532
Better Fuel Economy Factory Ratios Increased Power

Most Popular 225/45-R15 Comparisons

To Top