Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
226/60r16 vs 225/50r16 Tire Comparison Side By Side
  226/60-16 225/50-16 Difference
Diameter inches (mm) 26.68 (677.6) 24.86 (631.4) -1.82 (-46.2) -6.8%
Width inches (mm) 8.9 (226) 8.86 (225) -0.04 (-1) -0.4%
Circum. inches (mm) 83.81 (2128.74) 78.09 (1983.6) -5.71 (-145.14) -6.8%
Sidewall Height inches (mm) 5.34 (135.6) 4.43 (112.5) -0.91 (-23.1) -17%
Revolutions per mile (km) 756.01 (469.76) 811.32 (504.13) 55.32 (34.37) 7.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.64 mph (29.99 km/h)
25 mph (40.23 km/h)23.3 mph (37.49 km/h)
30 mph (48.28 km/h)27.95 mph (44.99 km/h)
35 mph (56.33 km/h)32.61 mph (52.49 km/h)
40 mph (64.37 km/h)37.27 mph (59.98 km/h)
45 mph (72.42 km/h)41.93 mph (67.48 km/h)
50 mph (80.47 km/h)46.59 mph (74.98 km/h)
55 mph (88.51 km/h)51.25 mph (82.48 km/h)
60 mph (96.56 km/h)55.91 mph (89.98 km/h)
65 mph (104.61 km/h)60.57 mph (97.48 km/h)
70 mph (112.65 km/h)65.23 mph (104.97 km/h)
75 mph (120.7 km/h)69.89 mph (112.47 km/h)
80 mph (128.75 km/h)74.55 mph (119.97 km/h)
85 mph (136.79 km/h)79.2 mph (127.47 km/h)
90 mph (144.84 km/h)83.86 mph (134.97 km/h)
95 mph (152.89 km/h)88.52 mph (142.46 km/h)
100 mph (160.93 km/h)93.18 mph (149.96 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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