Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/65r18 vs 235/55r19 Tire Comparison Side By Side
  235/65-18 235/55-19 Difference
Diameter inches (mm) 30.03 (762.7) 29.18 (741.1) -0.85 (-21.6) -2.8%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 94.33 (2396.09) 91.66 (2328.23) -2.67 (-67.86) -2.8%
Sidewall Height inches (mm) 6.01 (152.75) 5.09 (129.25) -0.93 (-23.5) -15.4%
Revolutions per mile (km) 671.65 (417.35) 691.23 (429.51) 19.58 (12.16) 2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.43 mph (31.28 km/h)
25 mph (40.23 km/h)24.29 mph (39.09 km/h)
30 mph (48.28 km/h)29.15 mph (46.91 km/h)
35 mph (56.33 km/h)34.01 mph (54.73 km/h)
40 mph (64.37 km/h)38.87 mph (62.55 km/h)
45 mph (72.42 km/h)43.73 mph (70.37 km/h)
50 mph (80.47 km/h)48.58 mph (78.19 km/h)
55 mph (88.51 km/h)53.44 mph (86.01 km/h)
60 mph (96.56 km/h)58.3 mph (93.83 km/h)
65 mph (104.61 km/h)63.16 mph (101.65 km/h)
70 mph (112.65 km/h)68.02 mph (109.46 km/h)
75 mph (120.7 km/h)72.88 mph (117.28 km/h)
80 mph (128.75 km/h)77.73 mph (125.1 km/h)
85 mph (136.79 km/h)82.59 mph (132.92 km/h)
90 mph (144.84 km/h)87.45 mph (140.74 km/h)
95 mph (152.89 km/h)92.31 mph (148.56 km/h)
100 mph (160.93 km/h)97.17 mph (156.38 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
17592043220122982403247825602657279229273076319634133653384039604027427446185367
Better Fuel Economy Factory Ratios Increased Power

Most Popular 235/65-R18 Comparisons

To Top