Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/55r17 vs 265/70r17 Tire Comparison Side By Side
  265/55-17 265/70-17 Difference
Diameter inches (mm) 28.48 (723.3) 31.61 (802.8) 3.13 (79.5) 11%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 89.46 (2272.31) 99.29 (2522.07) 9.83 (249.76) 11%
Sidewall Height inches (mm) 5.74 (145.75) 7.3 (185.5) 1.56 (39.75) 27.3%
Revolutions per mile (km) 708.24 (440.08) 638.1 (396.5) -70.14 (-43.58) -9.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.2 mph (35.72 km/h)
25 mph (40.23 km/h)27.75 mph (44.66 km/h)
30 mph (48.28 km/h)33.3 mph (53.59 km/h)
35 mph (56.33 km/h)38.85 mph (62.52 km/h)
40 mph (64.37 km/h)44.4 mph (71.45 km/h)
45 mph (72.42 km/h)49.95 mph (80.38 km/h)
50 mph (80.47 km/h)55.5 mph (89.31 km/h)
55 mph (88.51 km/h)61.05 mph (98.24 km/h)
60 mph (96.56 km/h)66.59 mph (107.17 km/h)
65 mph (104.61 km/h)72.14 mph (116.11 km/h)
70 mph (112.65 km/h)77.69 mph (125.04 km/h)
75 mph (120.7 km/h)83.24 mph (133.97 km/h)
80 mph (128.75 km/h)88.79 mph (142.9 km/h)
85 mph (136.79 km/h)94.34 mph (151.83 km/h)
90 mph (144.84 km/h)99.89 mph (160.76 km/h)
95 mph (152.89 km/h)105.44 mph (169.69 km/h)
100 mph (160.93 km/h)110.99 mph (178.62 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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