Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/50r15 vs 295/50r15 Tire Comparison Side By Side
  275/50-15 295/50-15 Difference
Diameter inches (mm) 25.83 (656) 26.61 (676) 0.79 (20) 3%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 81.14 (2060.88) 83.61 (2123.72) 2.47 (62.83) 3%
Sidewall Height inches (mm) 5.41 (137.5) 5.81 (147.5) 0.39 (10) 7.3%
Revolutions per mile (km) 780.9 (485.23) 757.8 (470.87) -23.1 (-14.36) -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 (66.34 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 (107.8 km/h)
70 mph (112.65 km/h)72.13 mph (116.09 km/h)
75 mph (120.7 km/h)77.29 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 (140.97 km/h)
90 mph (144.84 km/h)92.74 mph (149.26 km/h)
95 mph (152.89 km/h)97.9 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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