Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/80r16 vs 295/75r16 Tire Comparison Side By Side
  315/80-16 295/75-16 Difference
Diameter inches (mm) 35.84 (910.4) 33.42 (848.9) -2.42 (-61.5) -6.8%
Width inches (mm) 12.4 (315) 11.61 (295) -0.79 (-20) -6.3%
Circum. inches (mm) 112.6 (2860.11) 105 (2666.9) -7.61 (-193.21) -6.8%
Sidewall Height inches (mm) 9.92 (252) 8.71 (221.25) -1.21 (-30.75) -12.2%
Revolutions per mile (km) 562.69 (349.64) 603.45 (374.97) 40.76 (25.33) 7.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.65 mph (30.01 km/h)
25 mph (40.23 km/h)23.31 mph (37.52 km/h)
30 mph (48.28 km/h)27.97 mph (45.02 km/h)
35 mph (56.33 km/h)32.64 mph (52.52 km/h)
40 mph (64.37 km/h)37.3 mph (60.03 km/h)
45 mph (72.42 km/h)41.96 mph (67.53 km/h)
50 mph (80.47 km/h)46.62 mph (75.03 km/h)
55 mph (88.51 km/h)51.28 mph (82.53 km/h)
60 mph (96.56 km/h)55.95 mph (90.04 km/h)
65 mph (104.61 km/h)60.61 mph (97.54 km/h)
70 mph (112.65 km/h)65.27 mph (105.04 km/h)
75 mph (120.7 km/h)69.93 mph (112.55 km/h)
80 mph (128.75 km/h)74.6 mph (120.05 km/h)
85 mph (136.79 km/h)79.26 mph (127.55 km/h)
90 mph (144.84 km/h)83.92 mph (135.06 km/h)
95 mph (152.89 km/h)88.58 mph (142.56 km/h)
100 mph (160.93 km/h)93.24 mph (150.06 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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