Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/25r19 vs 295/30r19 Tire Comparison Side By Side
  315/25-19 295/30-19 Difference
Diameter inches (mm) 25.2 (640.1) 25.97 (659.6) 0.77 (19.5) 3%
Width inches (mm) 12.4 (315) 11.61 (295) -0.79 (-20) -6.3%
Circum. inches (mm) 79.17 (2010.93) 81.58 (2072.19) 2.41 (61.26) 3%
Sidewall Height inches (mm) 3.1 (78.75) 3.48 (88.5) 0.38 (9.75) 12.4%
Revolutions per mile (km) 800.3 (497.28) 776.64 (482.58) -23.66 (-14.7) -3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.61 mph (33.17 km/h)
25 mph (40.23 km/h)25.76 mph (41.46 km/h)
30 mph (48.28 km/h)30.91 mph (49.75 km/h)
35 mph (56.33 km/h)36.07 mph (58.04 km/h)
40 mph (64.37 km/h)41.22 mph (66.33 km/h)
45 mph (72.42 km/h)46.37 mph (74.63 km/h)
50 mph (80.47 km/h)51.52 mph (82.92 km/h)
55 mph (88.51 km/h)56.68 mph (91.21 km/h)
60 mph (96.56 km/h)61.83 mph (99.5 km/h)
65 mph (104.61 km/h)66.98 mph (107.79 km/h)
70 mph (112.65 km/h)72.13 mph (116.09 km/h)
75 mph (120.7 km/h)77.28 mph (124.38 km/h)
80 mph (128.75 km/h)82.44 mph (132.67 km/h)
85 mph (136.79 km/h)87.59 mph (140.96 km/h)
90 mph (144.84 km/h)92.74 mph (149.25 km/h)
95 mph (152.89 km/h)97.89 mph (157.55 km/h)
100 mph (160.93 km/h)103.05 mph (165.84 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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