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 255/95r14 Tire Comparison Side By Side
  185/95-14 255/95-14 Difference
Diameter inches (mm) 27.84 (707.1) 33.07 (840.1) 5.24 (133) 18.8%
Width inches (mm) 7.28 (185) 10.04 (255) 2.76 (70) 37.8%
Circum. inches (mm) 87.46 (2221.42) 103.91 (2639.25) 16.45 (417.83) 18.8%
Sidewall Height inches (mm) 6.92 (175.75) 9.54 (242.25) 2.62 (66.5) 37.8%
Revolutions per mile (km) 724.47 (450.16) 609.77 (378.89) -114.69 (-71.27) -15.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)23.76 mph (38.24 km/h)
25 mph (40.23 km/h)29.7 mph (47.8 km/h)
30 mph (48.28 km/h)35.64 mph (57.36 km/h)
35 mph (56.33 km/h)41.58 mph (66.92 km/h)
40 mph (64.37 km/h)47.52 mph (76.48 km/h)
45 mph (72.42 km/h)53.46 mph (86.04 km/h)
50 mph (80.47 km/h)59.4 mph (95.6 km/h)
55 mph (88.51 km/h)65.35 mph (105.16 km/h)
60 mph (96.56 km/h)71.29 mph (114.72 km/h)
65 mph (104.61 km/h)77.23 mph (124.28 km/h)
70 mph (112.65 km/h)83.17 mph (133.84 km/h)
75 mph (120.7 km/h)89.11 mph (143.4 km/h)
80 mph (128.75 km/h)95.05 mph (152.96 km/h)
85 mph (136.79 km/h)100.99 mph (162.52 km/h)
90 mph (144.84 km/h)106.93 mph (172.08 km/h)
95 mph (152.89 km/h)112.87 mph (181.65 km/h)
100 mph (160.93 km/h)118.81 mph (191.21 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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