Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/60r18 vs 295/45r20 Tire Comparison Side By Side
  245/60-18 295/45-20 Difference
Diameter inches (mm) 29.57 (751.2) 30.45 (773.5) 0.88 (22.3) 3%
Width inches (mm) 9.65 (245) 11.61 (295) 1.97 (50) 20.4%
Circum. inches (mm) 92.91 (2359.96) 95.67 (2430.02) 2.76 (70.06) 3%
Sidewall Height inches (mm) 5.79 (147) 5.23 (132.75) -0.56 (-14.25) -9.7%
Revolutions per mile (km) 681.94 (423.73) 662.28 (411.52) -19.66 (-12.22) -2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.59 mph (33.14 km/h)
25 mph (40.23 km/h)25.74 mph (41.43 km/h)
30 mph (48.28 km/h)30.89 mph (49.71 km/h)
35 mph (56.33 km/h)36.04 mph (58 km/h)
40 mph (64.37 km/h)41.19 mph (66.28 km/h)
45 mph (72.42 km/h)46.34 mph (74.57 km/h)
50 mph (80.47 km/h)51.48 mph (82.86 km/h)
55 mph (88.51 km/h)56.63 mph (91.14 km/h)
60 mph (96.56 km/h)61.78 mph (99.43 km/h)
65 mph (104.61 km/h)66.93 mph (107.71 km/h)
70 mph (112.65 km/h)72.08 mph (116 km/h)
75 mph (120.7 km/h)77.23 mph (124.28 km/h)
80 mph (128.75 km/h)82.37 mph (132.57 km/h)
85 mph (136.79 km/h)87.52 mph (140.86 km/h)
90 mph (144.84 km/h)92.67 mph (149.14 km/h)
95 mph (152.89 km/h)97.82 mph (157.43 km/h)
100 mph (160.93 km/h)102.97 mph (165.71 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
16851958210822022302237424532546267528042948306232703500367937943858409544255142
Better Fuel Economy Factory Ratios Increased Power

Most Popular 245/60-R18 Comparisons

To Top