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 275/50r15 Tire Comparison Side By Side
  295/60-15 275/50-15 Difference
Diameter inches (mm) 28.94 (735) 25.83 (656) -3.11 (-79) -10.7%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 90.91 (2309.07) 81.14 (2060.88) -9.77 (-248.19) -10.7%
Sidewall Height inches (mm) 6.97 (177) 5.41 (137.5) -1.56 (-39.5) -22.3%
Revolutions per mile (km) 696.97 (433.07) 780.9 (485.23) 83.93 (52.15) 12%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)17.85 mph (28.73 km/h)
25 mph (40.23 km/h)22.31 mph (35.91 km/h)
30 mph (48.28 km/h)26.78 mph (43.09 km/h)
35 mph (56.33 km/h)31.24 mph (50.27 km/h)
40 mph (64.37 km/h)35.7 mph (57.45 km/h)
45 mph (72.42 km/h)40.16 mph (64.64 km/h)
50 mph (80.47 km/h)44.63 mph (71.82 km/h)
55 mph (88.51 km/h)49.09 mph (79 km/h)
60 mph (96.56 km/h)53.55 mph (86.18 km/h)
65 mph (104.61 km/h)58.01 mph (93.36 km/h)
70 mph (112.65 km/h)62.48 mph (100.55 km/h)
75 mph (120.7 km/h)66.94 mph (107.73 km/h)
80 mph (128.75 km/h)71.4 mph (114.91 km/h)
85 mph (136.79 km/h)75.86 mph (122.09 km/h)
90 mph (144.84 km/h)80.33 mph (129.27 km/h)
95 mph (152.89 km/h)84.79 mph (136.46 km/h)
100 mph (160.93 km/h)89.25 mph (143.64 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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