Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
110/70r14 vs 110/70r13 Tire Comparison Side By Side
  110/70-14 110/70-13 Difference
Diameter inches (mm) 20.06 (509.6) 19.06 (484.2) -1 (-25.4) -5%
Width inches (mm) 4.33 (110) 4.33 (110) 0 (0) 0%
Circum. inches (mm) 63.03 (1600.96) 59.89 (1521.16) -3.14 (-79.8) -5%
Sidewall Height inches (mm) 3.03 (77) 3.03 (77) 0 (0) 0%
Revolutions per mile (km) 1005.24 (624.63) 1057.97 (657.39) 52.73 (32.77) 5.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19 mph (30.58 km/h)
25 mph (40.23 km/h)23.75 mph (38.23 km/h)
30 mph (48.28 km/h)28.5 mph (45.87 km/h)
35 mph (56.33 km/h)33.26 mph (53.52 km/h)
40 mph (64.37 km/h)38.01 mph (61.17 km/h)
45 mph (72.42 km/h)42.76 mph (68.81 km/h)
50 mph (80.47 km/h)47.51 mph (76.46 km/h)
55 mph (88.51 km/h)52.26 mph (84.1 km/h)
60 mph (96.56 km/h)57.01 mph (91.75 km/h)
65 mph (104.61 km/h)61.76 mph (99.39 km/h)
70 mph (112.65 km/h)66.51 mph (107.04 km/h)
75 mph (120.7 km/h)71.26 mph (114.68 km/h)
80 mph (128.75 km/h)76.01 mph (122.33 km/h)
85 mph (136.79 km/h)80.76 mph (129.98 km/h)
90 mph (144.84 km/h)85.51 mph (137.62 km/h)
95 mph (152.89 km/h)90.26 mph (145.27 km/h)
100 mph (160.93 km/h)95.02 mph (152.91 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
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