Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r14 vs 155/35r16 Tire Comparison Side By Side
  135/80-14 155/35-16 Difference
Diameter inches (mm) 22.5 (571.6) 20.27 (514.9) -2.23 (-56.7) -9.9%
Width inches (mm) 5.31 (135) 6.1 (155) 0.79 (20) 14.8%
Circum. inches (mm) 70.7 (1795.73) 63.69 (1617.61) -7.01 (-178.13) -9.9%
Sidewall Height inches (mm) 4.25 (108) 2.14 (54.25) -2.12 (-53.75) -49.8%
Revolutions per mile (km) 896.2 (556.87) 994.89 (618.2) 98.69 (61.32) 11%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.02 mph (28.99 km/h)
25 mph (40.23 km/h)22.52 mph (36.24 km/h)
30 mph (48.28 km/h)27.02 mph (43.49 km/h)
35 mph (56.33 km/h)31.53 mph (50.74 km/h)
40 mph (64.37 km/h)36.03 mph (57.99 km/h)
45 mph (72.42 km/h)40.54 mph (65.24 km/h)
50 mph (80.47 km/h)45.04 mph (72.49 km/h)
55 mph (88.51 km/h)49.54 mph (79.73 km/h)
60 mph (96.56 km/h)54.05 mph (86.98 km/h)
65 mph (104.61 km/h)58.55 mph (94.23 km/h)
70 mph (112.65 km/h)63.06 mph (101.48 km/h)
75 mph (120.7 km/h)67.56 mph (108.73 km/h)
80 mph (128.75 km/h)72.06 mph (115.98 km/h)
85 mph (136.79 km/h)76.57 mph (123.23 km/h)
90 mph (144.84 km/h)81.07 mph (130.47 km/h)
95 mph (152.89 km/h)85.58 mph (137.72 km/h)
100 mph (160.93 km/h)90.08 mph (144.97 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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