Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r16 vs 225/60r16 Tire Comparison Side By Side
  135/70-16 225/60-16 Difference
Diameter inches (mm) 23.44 (595.4) 26.63 (676.4) 3.19 (81) 13.6%
Width inches (mm) 5.31 (135) 8.86 (225) 3.54 (90) 66.7%
Circum. inches (mm) 73.64 (1870.5) 83.66 (2124.97) 10.02 (254.47) 13.6%
Sidewall Height inches (mm) 3.72 (94.5) 5.31 (135) 1.59 (40.5) 42.9%
Revolutions per mile (km) 860.38 (534.61) 757.35 (470.59) -103.03 (-64.02) -12%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.72 mph (36.57 km/h)
25 mph (40.23 km/h)28.4 mph (45.71 km/h)
30 mph (48.28 km/h)34.08 mph (54.85 km/h)
35 mph (56.33 km/h)39.76 mph (63.99 km/h)
40 mph (64.37 km/h)45.44 mph (73.13 km/h)
45 mph (72.42 km/h)51.12 mph (82.27 km/h)
50 mph (80.47 km/h)56.8 mph (91.41 km/h)
55 mph (88.51 km/h)62.48 mph (100.56 km/h)
60 mph (96.56 km/h)68.16 mph (109.7 km/h)
65 mph (104.61 km/h)73.84 mph (118.84 km/h)
70 mph (112.65 km/h)79.52 mph (127.98 km/h)
75 mph (120.7 km/h)85.2 mph (137.12 km/h)
80 mph (128.75 km/h)90.88 mph (146.26 km/h)
85 mph (136.79 km/h)96.56 mph (155.4 km/h)
90 mph (144.84 km/h)102.24 mph (164.55 km/h)
95 mph (152.89 km/h)107.92 mph (173.69 km/h)
100 mph (160.93 km/h)113.6 mph (182.83 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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