Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
355/25r21 vs 355/50r22 Tire Comparison Side By Side
  355/25-21 355/50-22 Difference
Diameter inches (mm) 27.99 (710.9) 35.98 (913.8) 7.99 (202.9) 28.5%
Width inches (mm) 13.98 (355) 13.98 (355) 0 (0) 0%
Circum. inches (mm) 87.93 (2233.36) 113.02 (2870.79) 25.1 (637.43) 28.5%
Sidewall Height inches (mm) 3.49 (88.75) 6.99 (177.5) 3.49 (88.75) 100%
Revolutions per mile (km) 720.59 (447.76) 560.59 (348.34) -160 (-99.42) -22.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.71 mph (41.37 km/h)
25 mph (40.23 km/h)32.14 mph (51.72 km/h)
30 mph (48.28 km/h)38.56 mph (62.06 km/h)
35 mph (56.33 km/h)44.99 mph (72.4 km/h)
40 mph (64.37 km/h)51.42 mph (82.75 km/h)
45 mph (72.42 km/h)57.84 mph (93.09 km/h)
50 mph (80.47 km/h)64.27 mph (103.43 km/h)
55 mph (88.51 km/h)70.7 mph (113.78 km/h)
60 mph (96.56 km/h)77.12 mph (124.12 km/h)
65 mph (104.61 km/h)83.55 mph (134.46 km/h)
70 mph (112.65 km/h)89.98 mph (144.81 km/h)
75 mph (120.7 km/h)96.41 mph (155.15 km/h)
80 mph (128.75 km/h)102.83 mph (165.49 km/h)
85 mph (136.79 km/h)109.26 mph (175.84 km/h)
90 mph (144.84 km/h)115.69 mph (186.18 km/h)
95 mph (152.89 km/h)122.11 mph (196.52 km/h)
100 mph (160.93 km/h)128.54 mph (206.87 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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