Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/60r18 vs 285/70r17 Tire Comparison Side By Side
  295/60-18 285/70-17 Difference
Diameter inches (mm) 31.94 (811.2) 32.71 (830.8) 0.77 (19.6) 2.4%
Width inches (mm) 11.61 (295) 11.22 (285) -0.39 (-10) -3.4%
Circum. inches (mm) 100.33 (2548.46) 102.76 (2610.04) 2.42 (61.58) 2.4%
Sidewall Height inches (mm) 6.97 (177) 7.85 (199.5) 0.89 (22.5) 12.7%
Revolutions per mile (km) 631.5 (392.39) 616.6 (383.14) -14.9 (-9.26) -2.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.48 mph (32.96 km/h)
25 mph (40.23 km/h)25.6 mph (41.21 km/h)
30 mph (48.28 km/h)30.72 mph (49.45 km/h)
35 mph (56.33 km/h)35.85 mph (57.69 km/h)
40 mph (64.37 km/h)40.97 mph (65.93 km/h)
45 mph (72.42 km/h)46.09 mph (74.17 km/h)
50 mph (80.47 km/h)51.21 mph (82.41 km/h)
55 mph (88.51 km/h)56.33 mph (90.65 km/h)
60 mph (96.56 km/h)61.45 mph (98.89 km/h)
65 mph (104.61 km/h)66.57 mph (107.14 km/h)
70 mph (112.65 km/h)71.69 mph (115.38 km/h)
75 mph (120.7 km/h)76.81 mph (123.62 km/h)
80 mph (128.75 km/h)81.93 mph (131.86 km/h)
85 mph (136.79 km/h)87.05 mph (140.1 km/h)
90 mph (144.84 km/h)92.17 mph (148.34 km/h)
95 mph (152.89 km/h)97.3 mph (156.58 km/h)
100 mph (160.93 km/h)102.42 mph (164.82 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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