Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
175/60r16 vs 130/90r16 Tire Comparison Side By Side
  175/60-16 130/90-16 Difference
Diameter inches (mm) 24.27 (616.4) 25.21 (640.4) 0.94 (24) 3.9%
Width inches (mm) 6.89 (175) 5.12 (130) -1.77 (-45) -25.7%
Circum. inches (mm) 76.24 (1936.48) 79.21 (2011.88) 2.97 (75.4) 3.9%
Sidewall Height inches (mm) 4.13 (105) 4.61 (117) 0.47 (12) 11.4%
Revolutions per mile (km) 831.07 (516.4) 799.92 (497.05) -31.15 (-19.35) -3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.78 mph (33.44 km/h)
25 mph (40.23 km/h)25.97 mph (41.8 km/h)
30 mph (48.28 km/h)31.17 mph (50.16 km/h)
35 mph (56.33 km/h)36.36 mph (58.52 km/h)
40 mph (64.37 km/h)41.56 mph (66.88 km/h)
45 mph (72.42 km/h)46.75 mph (75.24 km/h)
50 mph (80.47 km/h)51.95 mph (83.6 km/h)
55 mph (88.51 km/h)57.14 mph (91.96 km/h)
60 mph (96.56 km/h)62.34 mph (100.32 km/h)
65 mph (104.61 km/h)67.53 mph (108.68 km/h)
70 mph (112.65 km/h)72.73 mph (117.04 km/h)
75 mph (120.7 km/h)77.92 mph (125.4 km/h)
80 mph (128.75 km/h)83.11 mph (133.76 km/h)
85 mph (136.79 km/h)88.31 mph (142.12 km/h)
90 mph (144.84 km/h)93.5 mph (150.48 km/h)
95 mph (152.89 km/h)98.7 mph (158.84 km/h)
100 mph (160.93 km/h)103.89 mph (167.2 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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