Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/75r16.5 vs 295/85r16 Tire Comparison Side By Side
  245/75-16.5 295/85-16 Difference
Diameter inches (mm) 30.97 (786.6) 35.74 (907.9) 4.78 (121.3) 15.4%
Width inches (mm) 9.65 (245) 11.61 (295) 1.97 (50) 20.4%
Circum. inches (mm) 97.29 (2471.18) 112.29 (2852.25) 15 (381.08) 15.4%
Sidewall Height inches (mm) 7.23 (183.75) 9.87 (250.75) 2.64 (67) 36.5%
Revolutions per mile (km) 651.25 (404.66) 564.24 (350.6) -87.01 (-54.07) -13.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.08 mph (37.15 km/h)
25 mph (40.23 km/h)28.86 mph (46.44 km/h)
30 mph (48.28 km/h)34.63 mph (55.73 km/h)
35 mph (56.33 km/h)40.4 mph (65.01 km/h)
40 mph (64.37 km/h)46.17 mph (74.3 km/h)
45 mph (72.42 km/h)51.94 mph (83.59 km/h)
50 mph (80.47 km/h)57.71 mph (92.88 km/h)
55 mph (88.51 km/h)63.48 mph (102.16 km/h)
60 mph (96.56 km/h)69.25 mph (111.45 km/h)
65 mph (104.61 km/h)75.02 mph (120.74 km/h)
70 mph (112.65 km/h)80.79 mph (130.03 km/h)
75 mph (120.7 km/h)86.57 mph (139.31 km/h)
80 mph (128.75 km/h)92.34 mph (148.6 km/h)
85 mph (136.79 km/h)98.11 mph (157.89 km/h)
90 mph (144.84 km/h)103.88 mph (167.18 km/h)
95 mph (152.89 km/h)109.65 mph (176.46 km/h)
100 mph (160.93 km/h)115.42 mph (185.75 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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