Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
295/50r16 vs 305/70r15 Tire Comparison Side By Side
  295/50-16 305/70-15 Difference
Diameter inches (mm) 27.61 (701.4) 31.81 (808) 4.2 (106.6) 15.2%
Width inches (mm) 11.61 (295) 12.01 (305) 0.39 (10) 3.4%
Circum. inches (mm) 86.75 (2203.51) 99.94 (2538.41) 13.18 (334.89) 15.2%
Sidewall Height inches (mm) 5.81 (147.5) 8.41 (213.5) 2.6 (66) 44.7%
Revolutions per mile (km) 730.35 (453.82) 634 (393.95) -96.36 (-59.87) -13.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.04 mph (37.08 km/h)
25 mph (40.23 km/h)28.8 mph (46.35 km/h)
30 mph (48.28 km/h)34.56 mph (55.62 km/h)
35 mph (56.33 km/h)40.32 mph (64.89 km/h)
40 mph (64.37 km/h)46.08 mph (74.16 km/h)
45 mph (72.42 km/h)51.84 mph (83.43 km/h)
50 mph (80.47 km/h)57.6 mph (92.7 km/h)
55 mph (88.51 km/h)63.36 mph (101.97 km/h)
60 mph (96.56 km/h)69.12 mph (111.24 km/h)
65 mph (104.61 km/h)74.88 mph (120.51 km/h)
70 mph (112.65 km/h)80.64 mph (129.78 km/h)
75 mph (120.7 km/h)86.4 mph (139.05 km/h)
80 mph (128.75 km/h)92.16 mph (148.32 km/h)
85 mph (136.79 km/h)97.92 mph (157.58 km/h)
90 mph (144.84 km/h)103.68 mph (166.85 km/h)
95 mph (152.89 km/h)109.44 mph (176.12 km/h)
100 mph (160.93 km/h)115.2 mph (185.39 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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