Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/60r15 vs 255/50r17 Tire Comparison Side By Side
  255/60-15 255/50-17 Difference
Diameter inches (mm) 27.05 (687) 27.04 (686.8) -0.01 (-0.2) -0%
Width inches (mm) 10.04 (255) 10.04 (255) 0 (0) 0%
Circum. inches (mm) 84.97 (2158.27) 84.95 (2157.65) -0.02 (-0.63) -0%
Sidewall Height inches (mm) 6.02 (153) 5.02 (127.5) -1 (-25.5) -16.7%
Revolutions per mile (km) 745.66 (463.33) 745.88 (463.47) 0.22 (0.13) 0%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.99 mph (32.18 km/h)
25 mph (40.23 km/h)24.99 mph (40.22 km/h)
30 mph (48.28 km/h)29.99 mph (48.27 km/h)
35 mph (56.33 km/h)34.99 mph (56.31 km/h)
40 mph (64.37 km/h)39.99 mph (64.36 km/h)
45 mph (72.42 km/h)44.99 mph (72.4 km/h)
50 mph (80.47 km/h)49.99 mph (80.44 km/h)
55 mph (88.51 km/h)54.98 mph (88.49 km/h)
60 mph (96.56 km/h)59.98 mph (96.53 km/h)
65 mph (104.61 km/h)64.98 mph (104.58 km/h)
70 mph (112.65 km/h)69.98 mph (112.62 km/h)
75 mph (120.7 km/h)74.98 mph (120.67 km/h)
80 mph (128.75 km/h)79.98 mph (128.71 km/h)
85 mph (136.79 km/h)84.98 mph (136.75 km/h)
90 mph (144.84 km/h)89.97 mph (144.8 km/h)
95 mph (152.89 km/h)94.97 mph (152.84 km/h)
100 mph (160.93 km/h)99.97 mph (160.89 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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