Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/40r18 vs 295/35r18 Tire Comparison Side By Side
  295/40-18 295/35-18 Difference
Diameter inches (mm) 27.29 (693.2) 26.13 (663.7) -1.16 (-29.5) -4.3%
Width inches (mm) 11.61 (295) 11.61 (295) 0 (0) 0%
Circum. inches (mm) 85.74 (2177.75) 82.09 (2085.08) -3.65 (-92.68) -4.3%
Sidewall Height inches (mm) 4.65 (118) 4.06 (103.25) -0.58 (-14.75) -12.5%
Revolutions per mile (km) 738.99 (459.19) 771.84 (479.6) 32.85 (20.41) 4.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.15 mph (30.82 km/h)
25 mph (40.23 km/h)23.94 mph (38.52 km/h)
30 mph (48.28 km/h)28.72 mph (46.23 km/h)
35 mph (56.33 km/h)33.51 mph (53.93 km/h)
40 mph (64.37 km/h)38.3 mph (61.63 km/h)
45 mph (72.42 km/h)43.08 mph (69.34 km/h)
50 mph (80.47 km/h)47.87 mph (77.04 km/h)
55 mph (88.51 km/h)52.66 mph (84.75 km/h)
60 mph (96.56 km/h)57.45 mph (92.45 km/h)
65 mph (104.61 km/h)62.23 mph (100.16 km/h)
70 mph (112.65 km/h)67.02 mph (107.86 km/h)
75 mph (120.7 km/h)71.81 mph (115.56 km/h)
80 mph (128.75 km/h)76.6 mph (123.27 km/h)
85 mph (136.79 km/h)81.38 mph (130.97 km/h)
90 mph (144.84 km/h)86.17 mph (138.68 km/h)
95 mph (152.89 km/h)90.96 mph (146.38 km/h)
100 mph (160.93 km/h)95.74 mph (154.09 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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