Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/50r16 vs 255/50r17 Tire Comparison Side By Side
  255/50-16 255/50-17 Difference
Diameter inches (mm) 26.04 (661.4) 27.04 (686.8) 1 (25.4) 3.8%
Width inches (mm) 10.04 (255) 10.04 (255) 0 (0) 0%
Circum. inches (mm) 81.81 (2077.85) 84.95 (2157.65) 3.14 (79.8) 3.8%
Sidewall Height inches (mm) 5.02 (127.5) 5.02 (127.5) 0 (0) 0%
Revolutions per mile (km) 774.52 (481.27) 745.88 (463.47) -28.64 (-17.8) -3.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.77 mph (33.42 km/h)
25 mph (40.23 km/h)25.96 mph (41.78 km/h)
30 mph (48.28 km/h)31.15 mph (50.13 km/h)
35 mph (56.33 km/h)36.34 mph (58.49 km/h)
40 mph (64.37 km/h)41.54 mph (66.85 km/h)
45 mph (72.42 km/h)46.73 mph (75.2 km/h)
50 mph (80.47 km/h)51.92 mph (83.56 km/h)
55 mph (88.51 km/h)57.11 mph (91.91 km/h)
60 mph (96.56 km/h)62.3 mph (100.27 km/h)
65 mph (104.61 km/h)67.5 mph (108.62 km/h)
70 mph (112.65 km/h)72.69 mph (116.98 km/h)
75 mph (120.7 km/h)77.88 mph (125.34 km/h)
80 mph (128.75 km/h)83.07 mph (133.69 km/h)
85 mph (136.79 km/h)88.26 mph (142.05 km/h)
90 mph (144.84 km/h)93.46 mph (150.4 km/h)
95 mph (152.89 km/h)98.65 mph (158.76 km/h)
100 mph (160.93 km/h)103.84 mph (167.12 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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