Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/35r17 vs 275/40r17 Tire Comparison Side By Side
  255/35-17 275/40-17 Difference
Diameter inches (mm) 24.03 (610.3) 25.66 (651.8) 1.63 (41.5) 6.8%
Width inches (mm) 10.04 (255) 10.83 (275) 0.79 (20) 7.8%
Circum. inches (mm) 75.48 (1917.31) 80.62 (2047.69) 5.13 (130.38) 6.8%
Sidewall Height inches (mm) 3.51 (89.25) 4.33 (110) 0.82 (20.75) 23.2%
Revolutions per mile (km) 839.37 (521.56) 785.93 (488.35) -53.44 (-33.21) -6.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.36 mph (34.38 km/h)
25 mph (40.23 km/h)26.7 mph (42.97 km/h)
30 mph (48.28 km/h)32.04 mph (51.56 km/h)
35 mph (56.33 km/h)37.38 mph (60.16 km/h)
40 mph (64.37 km/h)42.72 mph (68.75 km/h)
45 mph (72.42 km/h)48.06 mph (77.35 km/h)
50 mph (80.47 km/h)53.4 mph (85.94 km/h)
55 mph (88.51 km/h)58.74 mph (94.53 km/h)
60 mph (96.56 km/h)64.08 mph (103.13 km/h)
65 mph (104.61 km/h)69.42 mph (111.72 km/h)
70 mph (112.65 km/h)74.76 mph (120.31 km/h)
75 mph (120.7 km/h)80.1 mph (128.91 km/h)
80 mph (128.75 km/h)85.44 mph (137.5 km/h)
85 mph (136.79 km/h)90.78 mph (146.1 km/h)
90 mph (144.84 km/h)96.12 mph (154.69 km/h)
95 mph (152.89 km/h)101.46 mph (163.28 km/h)
100 mph (160.93 km/h)106.8 mph (171.88 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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