Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r19 vs 135/55r19 Tire Comparison Side By Side
  135/70-19 135/55-19 Difference
Diameter inches (mm) 26.44 (671.6) 24.85 (631.1) -1.59 (-40.5) -6%
Width inches (mm) 5.31 (135) 5.31 (135) 0 (0) 0%
Circum. inches (mm) 83.07 (2109.89) 78.06 (1982.66) -5.01 (-127.23) -6%
Sidewall Height inches (mm) 3.72 (94.5) 2.92 (74.25) -0.8 (-20.25) -21.4%
Revolutions per mile (km) 762.76 (473.96) 811.71 (504.37) 48.95 (30.42) 6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.79 mph (30.25 km/h)
25 mph (40.23 km/h)23.49 mph (37.81 km/h)
30 mph (48.28 km/h)28.19 mph (45.37 km/h)
35 mph (56.33 km/h)32.89 mph (52.93 km/h)
40 mph (64.37 km/h)37.59 mph (60.49 km/h)
45 mph (72.42 km/h)42.29 mph (68.05 km/h)
50 mph (80.47 km/h)46.98 mph (75.61 km/h)
55 mph (88.51 km/h)51.68 mph (83.18 km/h)
60 mph (96.56 km/h)56.38 mph (90.74 km/h)
65 mph (104.61 km/h)61.08 mph (98.3 km/h)
70 mph (112.65 km/h)65.78 mph (105.86 km/h)
75 mph (120.7 km/h)70.48 mph (113.42 km/h)
80 mph (128.75 km/h)75.18 mph (120.98 km/h)
85 mph (136.79 km/h)79.87 mph (128.55 km/h)
90 mph (144.84 km/h)84.57 mph (136.11 km/h)
95 mph (152.89 km/h)89.27 mph (143.67 km/h)
100 mph (160.93 km/h)93.97 mph (151.23 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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