Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/90r15 vs 235/75r15 Tire Comparison Side By Side
  205/90-15 235/75-15 Difference
Diameter inches (mm) 29.53 (750) 28.88 (733.5) -0.65 (-16.5) -2.2%
Width inches (mm) 8.07 (205) 9.25 (235) 1.18 (30) 14.6%
Circum. inches (mm) 92.76 (2356.19) 90.72 (2304.36) -2.04 (-51.84) -2.2%
Sidewall Height inches (mm) 7.26 (184.5) 6.94 (176.25) -0.32 (-8.25) -4.5%
Revolutions per mile (km) 683.03 (424.41) 698.39 (433.96) 15.36 (9.55) 2.2%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.56 mph (31.48 km/h)
25 mph (40.23 km/h)24.45 mph (39.35 km/h)
30 mph (48.28 km/h)29.34 mph (47.22 km/h)
35 mph (56.33 km/h)34.23 mph (55.09 km/h)
40 mph (64.37 km/h)39.12 mph (62.96 km/h)
45 mph (72.42 km/h)44.01 mph (70.83 km/h)
50 mph (80.47 km/h)48.9 mph (78.7 km/h)
55 mph (88.51 km/h)53.79 mph (86.57 km/h)
60 mph (96.56 km/h)58.68 mph (94.44 km/h)
65 mph (104.61 km/h)63.57 mph (102.31 km/h)
70 mph (112.65 km/h)68.46 mph (110.18 km/h)
75 mph (120.7 km/h)73.35 mph (118.05 km/h)
80 mph (128.75 km/h)78.24 mph (125.92 km/h)
85 mph (136.79 km/h)83.13 mph (133.79 km/h)
90 mph (144.84 km/h)88.02 mph (141.65 km/h)
95 mph (152.89 km/h)92.91 mph (149.52 km/h)
100 mph (160.93 km/h)97.8 mph (157.39 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
17772065222323222428250325862685282129573108322934493691388040014069431846665423
Better Fuel Economy Factory Ratios Increased Power

Most Popular 205/90-R15 Comparisons

To Top