Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/40r26 vs 305/35r24 Tire Comparison Side By Side
  315/40-26 305/35-24 Difference
Diameter inches (mm) 35.92 (912.4) 32.41 (823.1) -3.52 (-89.3) -9.8%
Width inches (mm) 12.4 (315) 12.01 (305) -0.39 (-10) -3.2%
Circum. inches (mm) 112.85 (2866.39) 101.8 (2585.84) -11.05 (-280.54) -9.8%
Sidewall Height inches (mm) 4.96 (126) 4.2 (106.75) -0.76 (-19.25) -15.3%
Revolutions per mile (km) 561.45 (348.87) 622.37 (386.72) 60.91 (37.85) 10.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.04 mph (29.04 km/h)
25 mph (40.23 km/h)22.55 mph (36.3 km/h)
30 mph (48.28 km/h)27.06 mph (43.56 km/h)
35 mph (56.33 km/h)31.57 mph (50.81 km/h)
40 mph (64.37 km/h)36.09 mph (58.07 km/h)
45 mph (72.42 km/h)40.6 mph (65.33 km/h)
50 mph (80.47 km/h)45.11 mph (72.59 km/h)
55 mph (88.51 km/h)49.62 mph (79.85 km/h)
60 mph (96.56 km/h)54.13 mph (87.11 km/h)
65 mph (104.61 km/h)58.64 mph (94.37 km/h)
70 mph (112.65 km/h)63.15 mph (101.63 km/h)
75 mph (120.7 km/h)67.66 mph (108.89 km/h)
80 mph (128.75 km/h)72.17 mph (116.15 km/h)
85 mph (136.79 km/h)76.68 mph (123.41 km/h)
90 mph (144.84 km/h)81.19 mph (130.67 km/h)
95 mph (152.89 km/h)85.7 mph (137.92 km/h)
100 mph (160.93 km/h)90.21 mph (145.18 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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