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 245/50r16 Tire Comparison Side By Side
  255/50-16 245/50-16 Difference
Diameter inches (mm) 26.04 (661.4) 25.65 (651.4) -0.39 (-10) -1.5%
Width inches (mm) 10.04 (255) 9.65 (245) -0.39 (-10) -3.9%
Circum. inches (mm) 81.81 (2077.85) 80.57 (2046.43) -1.24 (-31.42) -1.5%
Sidewall Height inches (mm) 5.02 (127.5) 4.82 (122.5) -0.2 (-5) -3.9%
Revolutions per mile (km) 774.52 (481.27) 786.41 (488.65) 11.89 (7.39) 1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.7 mph (31.7 km/h)
25 mph (40.23 km/h)24.62 mph (39.63 km/h)
30 mph (48.28 km/h)29.55 mph (47.55 km/h)
35 mph (56.33 km/h)34.47 mph (55.48 km/h)
40 mph (64.37 km/h)39.4 mph (63.4 km/h)
45 mph (72.42 km/h)44.32 mph (71.33 km/h)
50 mph (80.47 km/h)49.24 mph (79.25 km/h)
55 mph (88.51 km/h)54.17 mph (87.18 km/h)
60 mph (96.56 km/h)59.09 mph (95.1 km/h)
65 mph (104.61 km/h)64.02 mph (103.03 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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