Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
285/60r18 vs 275/70r18 Tire Comparison Side By Side
  285/60-18 275/70-18 Difference
Diameter inches (mm) 31.46 (799.2) 33.16 (842.2) 1.69 (43) 5.4%
Width inches (mm) 11.22 (285) 10.83 (275) -0.39 (-10) -3.5%
Circum. inches (mm) 98.85 (2510.76) 104.17 (2645.85) 5.32 (135.09) 5.4%
Sidewall Height inches (mm) 6.73 (171) 7.58 (192.5) 0.85 (21.5) 12.6%
Revolutions per mile (km) 640.98 (398.28) 608.25 (377.95) -32.73 (-20.34) -5.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.08 mph (33.92 km/h)
25 mph (40.23 km/h)26.35 mph (42.4 km/h)
30 mph (48.28 km/h)31.61 mph (50.88 km/h)
35 mph (56.33 km/h)36.88 mph (59.36 km/h)
40 mph (64.37 km/h)42.15 mph (67.84 km/h)
45 mph (72.42 km/h)47.42 mph (76.32 km/h)
50 mph (80.47 km/h)52.69 mph (84.8 km/h)
55 mph (88.51 km/h)57.96 mph (93.28 km/h)
60 mph (96.56 km/h)63.23 mph (101.76 km/h)
65 mph (104.61 km/h)68.5 mph (110.24 km/h)
70 mph (112.65 km/h)73.77 mph (118.72 km/h)
75 mph (120.7 km/h)79.04 mph (127.2 km/h)
80 mph (128.75 km/h)84.3 mph (135.67 km/h)
85 mph (136.79 km/h)89.57 mph (144.15 km/h)
90 mph (144.84 km/h)94.84 mph (152.63 km/h)
95 mph (152.89 km/h)100.11 mph (161.11 km/h)
100 mph (160.93 km/h)105.38 mph (169.59 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
15481798193720222114218022532338245725752707281330043214337934843544376140644723
Better Fuel Economy Factory Ratios Increased Power

Most Popular 285/60-R18 Comparisons

To Top