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 275/60r15 Tire Comparison Side By Side
  295/60-15 275/60-15 Difference
Diameter inches (mm) 28.94 (735) 27.99 (711) -0.94 (-24) -3.3%
Width inches (mm) 11.61 (295) 10.83 (275) -0.79 (-20) -6.8%
Circum. inches (mm) 90.91 (2309.07) 87.94 (2233.67) -2.97 (-75.4) -3.3%
Sidewall Height inches (mm) 6.97 (177) 6.5 (165) -0.47 (-12) -6.8%
Revolutions per mile (km) 696.97 (433.07) 720.49 (447.69) 23.53 (14.62) 3.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.35 mph (31.14 km/h)
25 mph (40.23 km/h)24.18 mph (38.92 km/h)
30 mph (48.28 km/h)29.02 mph (46.7 km/h)
35 mph (56.33 km/h)33.86 mph (54.49 km/h)
40 mph (64.37 km/h)38.69 mph (62.27 km/h)
45 mph (72.42 km/h)43.53 mph (70.06 km/h)
50 mph (80.47 km/h)48.37 mph (77.84 km/h)
55 mph (88.51 km/h)53.2 mph (85.62 km/h)
60 mph (96.56 km/h)58.04 mph (93.41 km/h)
65 mph (104.61 km/h)62.88 mph (101.19 km/h)
70 mph (112.65 km/h)67.71 mph (108.98 km/h)
75 mph (120.7 km/h)72.55 mph (116.76 km/h)
80 mph (128.75 km/h)77.39 mph (124.54 km/h)
85 mph (136.79 km/h)82.22 mph (132.33 km/h)
90 mph (144.84 km/h)87.06 mph (140.11 km/h)
95 mph (152.89 km/h)91.9 mph (147.9 km/h)
100 mph (160.93 km/h)96.73 mph (155.68 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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