Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/35r17 vs 295/40r18 Tire Comparison Side By Side
  275/35-17 295/40-18 Difference
Diameter inches (mm) 24.58 (624.3) 27.29 (693.2) 2.71 (68.9) 11%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 77.22 (1961.3) 85.74 (2177.75) 8.52 (216.46) 11%
Sidewall Height inches (mm) 3.79 (96.25) 4.65 (118) 0.86 (21.75) 22.6%
Revolutions per mile (km) 820.55 (509.87) 738.99 (459.19) -81.56 (-50.68) -9.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.21 mph (35.74 km/h)
25 mph (40.23 km/h)27.76 mph (44.67 km/h)
30 mph (48.28 km/h)33.31 mph (53.61 km/h)
35 mph (56.33 km/h)38.86 mph (62.54 km/h)
40 mph (64.37 km/h)44.41 mph (71.48 km/h)
45 mph (72.42 km/h)49.97 mph (80.41 km/h)
50 mph (80.47 km/h)55.52 mph (89.35 km/h)
55 mph (88.51 km/h)61.07 mph (98.28 km/h)
60 mph (96.56 km/h)66.62 mph (107.22 km/h)
65 mph (104.61 km/h)72.17 mph (116.15 km/h)
70 mph (112.65 km/h)77.73 mph (125.09 km/h)
75 mph (120.7 km/h)83.28 mph (134.02 km/h)
80 mph (128.75 km/h)88.83 mph (142.96 km/h)
85 mph (136.79 km/h)94.38 mph (151.89 km/h)
90 mph (144.84 km/h)99.93 mph (160.83 km/h)
95 mph (152.89 km/h)105.48 mph (169.76 km/h)
100 mph (160.93 km/h)111.04 mph (178.7 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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