Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
170/60r17 vs 160/65r17 Tire Comparison Side By Side
  170/60-17 160/65-17 Difference
Diameter inches (mm) 25.03 (635.8) 25.19 (639.8) 0.16 (4) 0.6%
Width inches (mm) 6.69 (170) 6.3 (160) -0.39 (-10) -5.9%
Circum. inches (mm) 78.64 (1997.42) 79.13 (2009.99) 0.49 (12.57) 0.6%
Sidewall Height inches (mm) 4.02 (102) 4.09 (104) 0.08 (2) 2%
Revolutions per mile (km) 805.71 (500.64) 800.67 (497.51) -5.04 (-3.13) -0.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.13 mph (32.39 km/h)
25 mph (40.23 km/h)25.16 mph (40.49 km/h)
30 mph (48.28 km/h)30.19 mph (48.58 km/h)
35 mph (56.33 km/h)35.22 mph (56.68 km/h)
40 mph (64.37 km/h)40.25 mph (64.78 km/h)
45 mph (72.42 km/h)45.28 mph (72.88 km/h)
50 mph (80.47 km/h)50.31 mph (80.97 km/h)
55 mph (88.51 km/h)55.35 mph (89.07 km/h)
60 mph (96.56 km/h)60.38 mph (97.17 km/h)
65 mph (104.61 km/h)65.41 mph (105.27 km/h)
70 mph (112.65 km/h)70.44 mph (113.36 km/h)
75 mph (120.7 km/h)75.47 mph (121.46 km/h)
80 mph (128.75 km/h)80.5 mph (129.56 km/h)
85 mph (136.79 km/h)85.53 mph (137.66 km/h)
90 mph (144.84 km/h)90.57 mph (145.75 km/h)
95 mph (152.89 km/h)95.6 mph (153.85 km/h)
100 mph (160.93 km/h)100.63 mph (161.95 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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