Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
275/35r20 vs 255/40r20 Tire Comparison Side By Side
  275/35-20 255/40-20 Difference
Diameter inches (mm) 27.58 (700.5) 28.03 (712) 0.45 (11.5) 1.6%
Width inches (mm) 10.83 (275) 10.04 (255) -0.79 (-20) -7.3%
Circum. inches (mm) 86.64 (2200.69) 88.06 (2236.81) 1.42 (36.13) 1.6%
Sidewall Height inches (mm) 3.79 (96.25) 4.02 (102) 0.23 (5.75) 6%
Revolutions per mile (km) 731.29 (454.4) 719.48 (447.06) -11.81 (-7.34) -1.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.33 mph (32.72 km/h)
25 mph (40.23 km/h)25.41 mph (40.89 km/h)
30 mph (48.28 km/h)30.49 mph (49.07 km/h)
35 mph (56.33 km/h)35.57 mph (57.25 km/h)
40 mph (64.37 km/h)40.66 mph (65.43 km/h)
45 mph (72.42 km/h)45.74 mph (73.61 km/h)
50 mph (80.47 km/h)50.82 mph (81.79 km/h)
55 mph (88.51 km/h)55.9 mph (89.97 km/h)
60 mph (96.56 km/h)60.99 mph (98.15 km/h)
65 mph (104.61 km/h)66.07 mph (106.32 km/h)
70 mph (112.65 km/h)71.15 mph (114.5 km/h)
75 mph (120.7 km/h)76.23 mph (122.68 km/h)
80 mph (128.75 km/h)81.31 mph (130.86 km/h)
85 mph (136.79 km/h)86.4 mph (139.04 km/h)
90 mph (144.84 km/h)91.48 mph (147.22 km/h)
95 mph (152.89 km/h)96.56 mph (155.4 km/h)
100 mph (160.93 km/h)101.64 mph (163.58 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
18312127229123922501257926652766290630463202332735533802399741224192444948075586
Better Fuel Economy Factory Ratios Increased Power

Most Popular 275/35-R20 Comparisons

To Top