Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
305/35r24 vs 275/30r24 Tire Comparison Side By Side
  305/35-24 275/30-24 Difference
Diameter inches (mm) 32.41 (823.1) 30.5 (774.6) -1.91 (-48.5) -5.9%
Width inches (mm) 12.01 (305) 10.83 (275) -1.18 (-30) -9.8%
Circum. inches (mm) 101.8 (2585.84) 95.81 (2433.48) -6 (-152.37) -5.9%
Sidewall Height inches (mm) 4.2 (106.75) 3.25 (82.5) -0.95 (-24.25) -22.7%
Revolutions per mile (km) 622.37 (386.72) 661.34 (410.93) 38.97 (24.21) 6.3%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.82 mph (30.29 km/h)
25 mph (40.23 km/h)23.53 mph (37.86 km/h)
30 mph (48.28 km/h)28.23 mph (45.44 km/h)
35 mph (56.33 km/h)32.94 mph (53.01 km/h)
40 mph (64.37 km/h)37.64 mph (60.58 km/h)
45 mph (72.42 km/h)42.35 mph (68.15 km/h)
50 mph (80.47 km/h)47.05 mph (75.73 km/h)
55 mph (88.51 km/h)51.76 mph (83.3 km/h)
60 mph (96.56 km/h)56.46 mph (90.87 km/h)
65 mph (104.61 km/h)61.17 mph (98.44 km/h)
70 mph (112.65 km/h)65.88 mph (106.02 km/h)
75 mph (120.7 km/h)70.58 mph (113.59 km/h)
80 mph (128.75 km/h)75.29 mph (121.16 km/h)
85 mph (136.79 km/h)79.99 mph (128.73 km/h)
90 mph (144.84 km/h)84.7 mph (136.31 km/h)
95 mph (152.89 km/h)89.4 mph (143.88 km/h)
100 mph (160.93 km/h)94.11 mph (151.45 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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