Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/45r16 vs 150/60r17 Tire Comparison Side By Side
  315/45-16 150/60-17 Difference
Diameter inches (mm) 27.16 (689.9) 24.09 (611.8) -3.07 (-78.1) -11.3%
Width inches (mm) 12.4 (315) 5.91 (150) -6.5 (-165) -52.4%
Circum. inches (mm) 85.33 (2167.38) 75.67 (1922.03) -9.66 (-245.36) -11.3%
Sidewall Height inches (mm) 5.58 (141.75) 3.54 (90) -2.04 (-51.75) -36.5%
Revolutions per mile (km) 742.53 (461.38) 837.32 (520.28) 94.79 (58.9) 12.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.74 mph (28.54 km/h)
25 mph (40.23 km/h)22.17 mph (35.68 km/h)
30 mph (48.28 km/h)26.6 mph (42.81 km/h)
35 mph (56.33 km/h)31.04 mph (49.95 km/h)
40 mph (64.37 km/h)35.47 mph (57.09 km/h)
45 mph (72.42 km/h)39.91 mph (64.22 km/h)
50 mph (80.47 km/h)44.34 mph (71.36 km/h)
55 mph (88.51 km/h)48.77 mph (78.49 km/h)
60 mph (96.56 km/h)53.21 mph (85.63 km/h)
65 mph (104.61 km/h)57.64 mph (92.77 km/h)
70 mph (112.65 km/h)62.08 mph (99.9 km/h)
75 mph (120.7 km/h)66.51 mph (107.04 km/h)
80 mph (128.75 km/h)70.94 mph (114.17 km/h)
85 mph (136.79 km/h)75.38 mph (121.31 km/h)
90 mph (144.84 km/h)79.81 mph (128.44 km/h)
95 mph (152.89 km/h)84.25 mph (135.58 km/h)
100 mph (160.93 km/h)88.68 mph (142.72 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
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