Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/95r14 vs 29/11r14 Tire Comparison Side By Side
  185/95-14 29/11-14 Difference
Diameter inches (mm) 27.84 (707.1) 28.94 (735.04) 1.1 (27.94) 4%
Width inches (mm) 7.28 (185) 10.98 (279) 3.7 (94) 50.8%
Circum. inches (mm) 87.46 (2221.42) 90.91 (2309.2) 3.46 (87.78) 4%
Sidewall Height inches (mm) 6.92 (175.75) 7.47 (189.72) 0.55 (13.97) 7.9%
Revolutions per mile (km) 724.47 (450.16) 696.93 (433.05) -27.54 (-17.11) -3.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.79 mph (33.46 km/h)
25 mph (40.23 km/h)25.99 mph (41.82 km/h)
30 mph (48.28 km/h)31.19 mph (50.19 km/h)
35 mph (56.33 km/h)36.38 mph (58.55 km/h)
40 mph (64.37 km/h)41.58 mph (66.92 km/h)
45 mph (72.42 km/h)46.78 mph (75.28 km/h)
50 mph (80.47 km/h)51.98 mph (83.65 km/h)
55 mph (88.51 km/h)57.17 mph (92.01 km/h)
60 mph (96.56 km/h)62.37 mph (100.38 km/h)
65 mph (104.61 km/h)67.57 mph (108.74 km/h)
70 mph (112.65 km/h)72.77 mph (117.11 km/h)
75 mph (120.7 km/h)77.96 mph (125.47 km/h)
80 mph (128.75 km/h)83.16 mph (133.84 km/h)
85 mph (136.79 km/h)88.36 mph (142.2 km/h)
90 mph (144.84 km/h)93.56 mph (150.56 km/h)
95 mph (152.89 km/h)98.75 mph (158.93 km/h)
100 mph (160.93 km/h)103.95 mph (167.29 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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