Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r15 vs 205/50r16 Tire Comparison Side By Side
  135/70-15 205/50-16 Difference
Diameter inches (mm) 22.44 (570) 24.07 (611.4) 1.63 (41.4) 7.3%
Width inches (mm) 5.31 (135) 8.07 (205) 2.76 (70) 51.9%
Circum. inches (mm) 70.5 (1790.71) 75.62 (1920.77) 5.12 (130.06) 7.3%
Sidewall Height inches (mm) 3.72 (94.5) 4.04 (102.5) 0.31 (8) 8.5%
Revolutions per mile (km) 898.72 (558.44) 837.86 (520.62) -60.86 (-37.81) -6.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.45 mph (34.52 km/h)
25 mph (40.23 km/h)26.82 mph (43.16 km/h)
30 mph (48.28 km/h)32.18 mph (51.79 km/h)
35 mph (56.33 km/h)37.54 mph (60.42 km/h)
40 mph (64.37 km/h)42.91 mph (69.05 km/h)
45 mph (72.42 km/h)48.27 mph (77.68 km/h)
50 mph (80.47 km/h)53.63 mph (86.31 km/h)
55 mph (88.51 km/h)58.99 mph (94.94 km/h)
60 mph (96.56 km/h)64.36 mph (103.57 km/h)
65 mph (104.61 km/h)69.72 mph (112.21 km/h)
70 mph (112.65 km/h)75.08 mph (120.84 km/h)
75 mph (120.7 km/h)80.45 mph (129.47 km/h)
80 mph (128.75 km/h)85.81 mph (138.1 km/h)
85 mph (136.79 km/h)91.17 mph (146.73 km/h)
90 mph (144.84 km/h)96.54 mph (155.36 km/h)
95 mph (152.89 km/h)101.9 mph (163.99 km/h)
100 mph (160.93 km/h)107.26 mph (172.62 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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