Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
215/35r19 vs 245/35r19 Tire Comparison Side By Side
  215/35-19 245/35-19 Difference
Diameter inches (mm) 24.93 (633.1) 25.75 (654.1) 0.83 (21) 3.3%
Width inches (mm) 8.46 (215) 9.65 (245) 1.18 (30) 14%
Circum. inches (mm) 78.3 (1988.94) 80.9 (2054.92) 2.6 (65.97) 3.3%
Sidewall Height inches (mm) 2.96 (75.25) 3.38 (85.75) 0.41 (10.5) 14%
Revolutions per mile (km) 809.15 (502.78) 783.17 (486.64) -25.98 (-16.14) -3.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.66 mph (33.25 km/h)
25 mph (40.23 km/h)25.83 mph (41.57 km/h)
30 mph (48.28 km/h)31 mph (49.88 km/h)
35 mph (56.33 km/h)36.16 mph (58.2 km/h)
40 mph (64.37 km/h)41.33 mph (66.51 km/h)
45 mph (72.42 km/h)46.49 mph (74.82 km/h)
50 mph (80.47 km/h)51.66 mph (83.14 km/h)
55 mph (88.51 km/h)56.82 mph (91.45 km/h)
60 mph (96.56 km/h)61.99 mph (99.76 km/h)
65 mph (104.61 km/h)67.16 mph (108.08 km/h)
70 mph (112.65 km/h)72.32 mph (116.39 km/h)
75 mph (120.7 km/h)77.49 mph (124.7 km/h)
80 mph (128.75 km/h)82.65 mph (133.02 km/h)
85 mph (136.79 km/h)87.82 mph (141.33 km/h)
90 mph (144.84 km/h)92.99 mph (149.65 km/h)
95 mph (152.89 km/h)98.15 mph (157.96 km/h)
100 mph (160.93 km/h)103.32 mph (166.27 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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