Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/50r14 vs 245/60r14 Tire Comparison Side By Side
  245/50-14 245/60-14 Difference
Diameter inches (mm) 23.65 (600.6) 25.57 (649.6) 1.93 (49) 8.2%
Width inches (mm) 9.65 (245) 9.65 (245) 0 (0) 0%
Circum. inches (mm) 74.29 (1886.84) 80.35 (2040.78) 6.06 (153.94) 8.2%
Sidewall Height inches (mm) 4.82 (122.5) 5.79 (147) 0.96 (24.5) 20%
Revolutions per mile (km) 852.93 (529.99) 788.59 (490.01) -64.34 (-39.98) -7.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.63 mph (34.81 km/h)
25 mph (40.23 km/h)27.04 mph (43.52 km/h)
30 mph (48.28 km/h)32.45 mph (52.22 km/h)
35 mph (56.33 km/h)37.86 mph (60.92 km/h)
40 mph (64.37 km/h)43.26 mph (69.63 km/h)
45 mph (72.42 km/h)48.67 mph (78.33 km/h)
50 mph (80.47 km/h)54.08 mph (87.03 km/h)
55 mph (88.51 km/h)59.49 mph (95.74 km/h)
60 mph (96.56 km/h)64.9 mph (104.44 km/h)
65 mph (104.61 km/h)70.3 mph (113.14 km/h)
70 mph (112.65 km/h)75.71 mph (121.85 km/h)
75 mph (120.7 km/h)81.12 mph (130.55 km/h)
80 mph (128.75 km/h)86.53 mph (139.25 km/h)
85 mph (136.79 km/h)91.93 mph (147.95 km/h)
90 mph (144.84 km/h)97.34 mph (156.66 km/h)
95 mph (152.89 km/h)102.75 mph (165.36 km/h)
100 mph (160.93 km/h)108.16 mph (174.06 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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