Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r19 vs 265/60r18 Tire Comparison Side By Side
  265/70-19 265/60-18 Difference
Diameter inches (mm) 33.61 (853.6) 30.52 (775.2) -3.09 (-78.4) -9.2%
Width inches (mm) 10.43 (265) 10.43 (265) 0 (0) 0%
Circum. inches (mm) 105.58 (2681.66) 95.88 (2435.36) -9.7 (-246.3) -9.2%
Sidewall Height inches (mm) 7.3 (185.5) 6.26 (159) -1.04 (-26.5) -14.3%
Revolutions per mile (km) 600.13 (372.9) 660.82 (410.62) 60.69 (37.71) 10.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.16 mph (29.23 km/h)
25 mph (40.23 km/h)22.7 mph (36.54 km/h)
30 mph (48.28 km/h)27.24 mph (43.85 km/h)
35 mph (56.33 km/h)31.79 mph (51.15 km/h)
40 mph (64.37 km/h)36.33 mph (58.46 km/h)
45 mph (72.42 km/h)40.87 mph (65.77 km/h)
50 mph (80.47 km/h)45.41 mph (73.08 km/h)
55 mph (88.51 km/h)49.95 mph (80.38 km/h)
60 mph (96.56 km/h)54.49 mph (87.69 km/h)
65 mph (104.61 km/h)59.03 mph (95 km/h)
70 mph (112.65 km/h)63.57 mph (102.31 km/h)
75 mph (120.7 km/h)68.11 mph (109.62 km/h)
80 mph (128.75 km/h)72.65 mph (116.92 km/h)
85 mph (136.79 km/h)77.19 mph (124.23 km/h)
90 mph (144.84 km/h)81.73 mph (131.54 km/h)
95 mph (152.89 km/h)86.27 mph (138.85 km/h)
100 mph (160.93 km/h)90.82 mph (146.15 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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