Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/40r20 vs 295/35r20 Tire Comparison Side By Side
  275/40-20 295/35-20 Difference
Diameter inches (mm) 28.66 (728) 28.13 (714.5) -0.53 (-13.5) -1.9%
Width inches (mm) 10.83 (275) 11.61 (295) 0.79 (20) 7.3%
Circum. inches (mm) 90.04 (2287.08) 88.37 (2244.67) -1.67 (-42.41) -1.9%
Sidewall Height inches (mm) 4.33 (110) 4.06 (103.25) -0.27 (-6.75) -6.1%
Revolutions per mile (km) 703.67 (437.24) 716.96 (445.5) 13.3 (8.26) 1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.63 mph (31.59 km/h)
25 mph (40.23 km/h)24.54 mph (39.49 km/h)
30 mph (48.28 km/h)29.44 mph (47.39 km/h)
35 mph (56.33 km/h)34.35 mph (55.28 km/h)
40 mph (64.37 km/h)39.26 mph (63.18 km/h)
45 mph (72.42 km/h)44.17 mph (71.08 km/h)
50 mph (80.47 km/h)49.07 mph (78.98 km/h)
55 mph (88.51 km/h)53.98 mph (86.87 km/h)
60 mph (96.56 km/h)58.89 mph (94.77 km/h)
65 mph (104.61 km/h)63.79 mph (102.67 km/h)
70 mph (112.65 km/h)68.7 mph (110.57 km/h)
75 mph (120.7 km/h)73.61 mph (118.46 km/h)
80 mph (128.75 km/h)78.52 mph (126.36 km/h)
85 mph (136.79 km/h)83.42 mph (134.26 km/h)
90 mph (144.84 km/h)88.33 mph (142.16 km/h)
95 mph (152.89 km/h)93.24 mph (150.05 km/h)
100 mph (160.93 km/h)98.15 mph (157.95 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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