Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
90/90r17 vs 110/90r17 Tire Comparison Side By Side
  90/90-17 110/90-17 Difference
Diameter inches (mm) 23.38 (593.8) 24.8 (629.8) 1.42 (36) 6.1%
Width inches (mm) 3.54 (90) 4.33 (110) 0.79 (20) 22.2%
Circum. inches (mm) 73.44 (1865.48) 77.9 (1978.58) 4.45 (113.1) 6.1%
Sidewall Height inches (mm) 3.19 (81) 3.9 (99) 0.71 (18) 22.2%
Revolutions per mile (km) 862.7 (536.05) 813.39 (505.41) -49.31 (-30.64) -5.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.21 mph (34.14 km/h)
25 mph (40.23 km/h)26.52 mph (42.67 km/h)
30 mph (48.28 km/h)31.82 mph (51.21 km/h)
35 mph (56.33 km/h)37.12 mph (59.74 km/h)
40 mph (64.37 km/h)42.43 mph (68.28 km/h)
45 mph (72.42 km/h)47.73 mph (76.81 km/h)
50 mph (80.47 km/h)53.03 mph (85.35 km/h)
55 mph (88.51 km/h)58.33 mph (93.88 km/h)
60 mph (96.56 km/h)63.64 mph (102.41 km/h)
65 mph (104.61 km/h)68.94 mph (110.95 km/h)
70 mph (112.65 km/h)74.24 mph (119.48 km/h)
75 mph (120.7 km/h)79.55 mph (128.02 km/h)
80 mph (128.75 km/h)84.85 mph (136.55 km/h)
85 mph (136.79 km/h)90.15 mph (145.09 km/h)
90 mph (144.84 km/h)95.46 mph (153.62 km/h)
95 mph (152.89 km/h)100.76 mph (162.16 km/h)
100 mph (160.93 km/h)106.06 mph (170.69 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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