Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/75r17 vs 35/11.5r17 Tire Comparison Side By Side
  315/75-17 35/11.5-17 Difference
Diameter inches (mm) 35.6 (904.3) 34.93 (887.32) -0.67 (-16.98) -1.9%
Width inches (mm) 12.4 (315) 11.5 (292) -0.91 (-23) -7.3%
Circum. inches (mm) 111.85 (2840.94) 109.75 (2787.6) -2.1 (-53.34) -1.9%
Sidewall Height inches (mm) 9.3 (236.25) 8.97 (227.76) -0.33 (-8.49) -3.6%
Revolutions per mile (km) 566.48 (352) 577.32 (358.73) 10.84 (6.74) 1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.62 mph (31.58 km/h)
25 mph (40.23 km/h)24.53 mph (39.48 km/h)
30 mph (48.28 km/h)29.44 mph (47.37 km/h)
35 mph (56.33 km/h)34.34 mph (55.27 km/h)
40 mph (64.37 km/h)39.25 mph (63.17 km/h)
45 mph (72.42 km/h)44.16 mph (71.06 km/h)
50 mph (80.47 km/h)49.06 mph (78.96 km/h)
55 mph (88.51 km/h)53.97 mph (86.85 km/h)
60 mph (96.56 km/h)58.87 mph (94.75 km/h)
65 mph (104.61 km/h)63.78 mph (102.64 km/h)
70 mph (112.65 km/h)68.69 mph (110.54 km/h)
75 mph (120.7 km/h)73.59 mph (118.43 km/h)
80 mph (128.75 km/h)78.5 mph (126.33 km/h)
85 mph (136.79 km/h)83.4 mph (134.23 km/h)
90 mph (144.84 km/h)88.31 mph (142.12 km/h)
95 mph (152.89 km/h)93.22 mph (150.02 km/h)
100 mph (160.93 km/h)98.12 mph (157.91 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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