Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/75r15 vs 295/75r15 Tire Comparison Side By Side
  275/75-15 295/75-15 Difference
Diameter inches (mm) 31.24 (793.5) 32.42 (823.5) 1.18 (30) 3.8%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 98.14 (2492.85) 101.85 (2587.1) 3.71 (94.25) 3.8%
Sidewall Height inches (mm) 8.12 (206.25) 8.71 (221.25) 0.59 (15) 7.3%
Revolutions per mile (km) 645.58 (401.15) 622.06 (386.53) -23.52 (-14.61) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.76 mph (33.4 km/h)
25 mph (40.23 km/h)25.95 mph (41.75 km/h)
30 mph (48.28 km/h)31.13 mph (50.11 km/h)
35 mph (56.33 km/h)36.32 mph (58.46 km/h)
40 mph (64.37 km/h)41.51 mph (66.81 km/h)
45 mph (72.42 km/h)46.7 mph (75.16 km/h)
50 mph (80.47 km/h)51.89 mph (83.51 km/h)
55 mph (88.51 km/h)57.08 mph (91.86 km/h)
60 mph (96.56 km/h)62.27 mph (100.21 km/h)
65 mph (104.61 km/h)67.46 mph (108.56 km/h)
70 mph (112.65 km/h)72.65 mph (116.91 km/h)
75 mph (120.7 km/h)77.84 mph (125.26 km/h)
80 mph (128.75 km/h)83.02 mph (133.62 km/h)
85 mph (136.79 km/h)88.21 mph (141.97 km/h)
90 mph (144.84 km/h)93.4 mph (150.32 km/h)
95 mph (152.89 km/h)98.59 mph (158.67 km/h)
100 mph (160.93 km/h)103.78 mph (167.02 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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