Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/35r18 vs 195/35r18 Tire Comparison Side By Side
  205/35-18 195/35-18 Difference
Diameter inches (mm) 23.65 (600.7) 23.37 (593.7) -0.28 (-7) -1.2%
Width inches (mm) 8.07 (205) 7.68 (195) -0.39 (-10) -4.9%
Circum. inches (mm) 74.3 (1887.15) 73.43 (1865.16) -0.87 (-21.99) -1.2%
Sidewall Height inches (mm) 2.82 (71.75) 2.69 (68.25) -0.14 (-3.5) -4.9%
Revolutions per mile (km) 852.79 (529.9) 862.84 (536.14) 10.05 (6.25) 1.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.77 mph (31.81 km/h)
25 mph (40.23 km/h)24.71 mph (39.76 km/h)
30 mph (48.28 km/h)29.65 mph (47.72 km/h)
35 mph (56.33 km/h)34.59 mph (55.67 km/h)
40 mph (64.37 km/h)39.53 mph (63.62 km/h)
45 mph (72.42 km/h)44.48 mph (71.58 km/h)
50 mph (80.47 km/h)49.42 mph (79.53 km/h)
55 mph (88.51 km/h)54.36 mph (87.48 km/h)
60 mph (96.56 km/h)59.3 mph (95.44 km/h)
65 mph (104.61 km/h)64.24 mph (103.39 km/h)
70 mph (112.65 km/h)69.18 mph (111.34 km/h)
75 mph (120.7 km/h)74.13 mph (119.29 km/h)
80 mph (128.75 km/h)79.07 mph (127.25 km/h)
85 mph (136.79 km/h)84.01 mph (135.2 km/h)
90 mph (144.84 km/h)88.95 mph (143.15 km/h)
95 mph (152.89 km/h)93.89 mph (151.11 km/h)
100 mph (160.93 km/h)98.83 mph (159.06 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
21962551274728692999309331963317348536533840399042614560479349435027533557656699
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/35-R18 Comparisons

To Top