Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/60r15 vs 255/70r15 Tire Comparison Side By Side
  295/60-15 255/70-15 Difference
Diameter inches (mm) 28.94 (735) 29.06 (738) 0.12 (3) 0.4%
Width inches (mm) 11.61 (295) 10.04 (255) -1.57 (-40) -13.6%
Circum. inches (mm) 90.91 (2309.07) 91.28 (2318.5) 0.37 (9.42) 0.4%
Sidewall Height inches (mm) 6.97 (177) 7.03 (178.5) 0.06 (1.5) 0.8%
Revolutions per mile (km) 696.97 (433.07) 694.13 (431.31) -2.83 (-1.76) -0.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.08 mph (32.32 km/h)
25 mph (40.23 km/h)25.1 mph (40.4 km/h)
30 mph (48.28 km/h)30.12 mph (48.48 km/h)
35 mph (56.33 km/h)35.14 mph (56.56 km/h)
40 mph (64.37 km/h)40.16 mph (64.64 km/h)
45 mph (72.42 km/h)45.18 mph (72.72 km/h)
50 mph (80.47 km/h)50.2 mph (80.8 km/h)
55 mph (88.51 km/h)55.22 mph (88.88 km/h)
60 mph (96.56 km/h)60.24 mph (96.95 km/h)
65 mph (104.61 km/h)65.27 mph (105.03 km/h)
70 mph (112.65 km/h)70.29 mph (113.11 km/h)
75 mph (120.7 km/h)75.31 mph (121.19 km/h)
80 mph (128.75 km/h)80.33 mph (129.27 km/h)
85 mph (136.79 km/h)85.35 mph (137.35 km/h)
90 mph (144.84 km/h)90.37 mph (145.43 km/h)
95 mph (152.89 km/h)95.39 mph (153.51 km/h)
100 mph (160.93 km/h)100.41 mph (161.59 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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