Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/70r10 vs 265/70r10 Tire Comparison Side By Side
  165/70-10 265/70-10 Difference
Diameter inches (mm) 19.09 (485) 24.61 (625) 5.51 (140) 28.9%
Width inches (mm) 6.5 (165) 10.43 (265) 3.94 (100) 60.6%
Circum. inches (mm) 59.99 (1523.67) 77.3 (1963.5) 17.32 (439.82) 28.9%
Sidewall Height inches (mm) 4.55 (115.5) 7.3 (185.5) 2.76 (70) 60.6%
Revolutions per mile (km) 1056.23 (656.31) 819.63 (509.29) -236.59 (-147.01) -22.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)25.77 mph (41.48 km/h)
25 mph (40.23 km/h)32.22 mph (51.85 km/h)
30 mph (48.28 km/h)38.66 mph (62.22 km/h)
35 mph (56.33 km/h)45.1 mph (72.59 km/h)
40 mph (64.37 km/h)51.55 mph (82.96 km/h)
45 mph (72.42 km/h)57.99 mph (93.33 km/h)
50 mph (80.47 km/h)64.43 mph (103.7 km/h)
55 mph (88.51 km/h)70.88 mph (114.06 km/h)
60 mph (96.56 km/h)77.32 mph (124.43 km/h)
65 mph (104.61 km/h)83.76 mph (134.8 km/h)
70 mph (112.65 km/h)90.21 mph (145.17 km/h)
75 mph (120.7 km/h)96.65 mph (155.54 km/h)
80 mph (128.75 km/h)103.09 mph (165.91 km/h)
85 mph (136.79 km/h)109.54 mph (176.28 km/h)
90 mph (144.84 km/h)115.98 mph (186.65 km/h)
95 mph (152.89 km/h)122.42 mph (197.02 km/h)
100 mph (160.93 km/h)128.87 mph (207.39 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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