Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/90r17 vs 165/95r15 Tire Comparison Side By Side
  165/90-17 165/95-15 Difference
Diameter inches (mm) 28.69 (728.8) 27.34 (694.5) -1.35 (-34.3) -4.7%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 90.14 (2289.59) 85.9 (2181.84) -4.24 (-107.76) -4.7%
Sidewall Height inches (mm) 5.85 (148.5) 6.17 (156.75) 0.32 (8.25) 5.6%
Revolutions per mile (km) 702.9 (436.76) 737.61 (458.33) 34.71 (21.57) 4.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.06 mph (30.67 km/h)
25 mph (40.23 km/h)23.82 mph (38.34 km/h)
30 mph (48.28 km/h)28.59 mph (46.01 km/h)
35 mph (56.33 km/h)33.35 mph (53.68 km/h)
40 mph (64.37 km/h)38.12 mph (61.34 km/h)
45 mph (72.42 km/h)42.88 mph (69.01 km/h)
50 mph (80.47 km/h)47.65 mph (76.68 km/h)
55 mph (88.51 km/h)52.41 mph (84.35 km/h)
60 mph (96.56 km/h)57.18 mph (92.02 km/h)
65 mph (104.61 km/h)61.94 mph (99.68 km/h)
70 mph (112.65 km/h)66.71 mph (107.35 km/h)
75 mph (120.7 km/h)71.47 mph (115.02 km/h)
80 mph (128.75 km/h)76.23 mph (122.69 km/h)
85 mph (136.79 km/h)81 mph (130.36 km/h)
90 mph (144.84 km/h)85.76 mph (138.02 km/h)
95 mph (152.89 km/h)90.53 mph (145.69 km/h)
100 mph (160.93 km/h)95.29 mph (153.36 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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