Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
280/85r16 vs 315/75r16 Tire Comparison Side By Side
  280/85-16 315/75-16 Difference
Diameter inches (mm) 34.74 (882.4) 34.6 (878.9) -0.14 (-3.5) -0.4%
Width inches (mm) 11.02 (280) 12.4 (315) 1.38 (35) 12.5%
Circum. inches (mm) 109.14 (2772.14) 108.71 (2761.15) -0.43 (-11) -0.4%
Sidewall Height inches (mm) 9.37 (238) 9.3 (236.25) -0.07 (-1.75) -0.7%
Revolutions per mile (km) 580.54 (360.73) 582.85 (362.17) 2.31 (1.44) 0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.92 mph (32.06 km/h)
25 mph (40.23 km/h)24.9 mph (40.07 km/h)
30 mph (48.28 km/h)29.88 mph (48.09 km/h)
35 mph (56.33 km/h)34.86 mph (56.1 km/h)
40 mph (64.37 km/h)39.84 mph (64.12 km/h)
45 mph (72.42 km/h)44.82 mph (72.13 km/h)
50 mph (80.47 km/h)49.8 mph (80.15 km/h)
55 mph (88.51 km/h)54.78 mph (88.16 km/h)
60 mph (96.56 km/h)59.76 mph (96.18 km/h)
65 mph (104.61 km/h)64.74 mph (104.19 km/h)
70 mph (112.65 km/h)69.72 mph (112.21 km/h)
75 mph (120.7 km/h)74.7 mph (120.22 km/h)
80 mph (128.75 km/h)79.68 mph (128.24 km/h)
85 mph (136.79 km/h)84.66 mph (136.25 km/h)
90 mph (144.84 km/h)89.64 mph (144.27 km/h)
95 mph (152.89 km/h)94.62 mph (152.28 km/h)
100 mph (160.93 km/h)99.6 mph (160.3 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
14831723185619382026208921592241235424682594269528783080323833393396360438944525
Better Fuel Economy Factory Ratios Increased Power

Most Popular 280/85-R16 Comparisons

To Top