Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
315/25r23 vs 355/40r24 Tire Comparison Side By Side
  315/25-23 355/40-24 Difference
Diameter inches (mm) 29.2 (741.7) 35.18 (893.6) 5.98 (151.9) 20.5%
Width inches (mm) 12.4 (315) 13.98 (355) 1.57 (40) 12.7%
Circum. inches (mm) 91.74 (2330.12) 110.52 (2807.33) 18.79 (477.21) 20.5%
Sidewall Height inches (mm) 3.1 (78.75) 5.59 (142) 2.49 (63.25) 80.3%
Revolutions per mile (km) 690.67 (429.16) 573.27 (356.21) -117.4 (-72.95) -17%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)24.1 mph (38.78 km/h)
25 mph (40.23 km/h)30.12 mph (48.47 km/h)
30 mph (48.28 km/h)36.14 mph (58.17 km/h)
35 mph (56.33 km/h)42.17 mph (67.86 km/h)
40 mph (64.37 km/h)48.19 mph (77.56 km/h)
45 mph (72.42 km/h)54.22 mph (87.25 km/h)
50 mph (80.47 km/h)60.24 mph (96.95 km/h)
55 mph (88.51 km/h)66.26 mph (106.64 km/h)
60 mph (96.56 km/h)72.29 mph (116.34 km/h)
65 mph (104.61 km/h)78.31 mph (126.03 km/h)
70 mph (112.65 km/h)84.34 mph (135.73 km/h)
75 mph (120.7 km/h)90.36 mph (145.42 km/h)
80 mph (128.75 km/h)96.38 mph (155.12 km/h)
85 mph (136.79 km/h)102.41 mph (164.81 km/h)
90 mph (144.84 km/h)108.43 mph (174.5 km/h)
95 mph (152.89 km/h)114.46 mph (184.2 km/h)
100 mph (160.93 km/h)120.48 mph (193.89 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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