Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
125/90r16 vs 115/90r16 Tire Comparison Side By Side
  125/90-16 115/90-16 Difference
Diameter inches (mm) 24.86 (631.4) 24.15 (613.4) -0.71 (-18) -2.9%
Width inches (mm) 4.92 (125) 4.53 (115) -0.39 (-10) -8%
Circum. inches (mm) 78.09 (1983.6) 75.87 (1927.05) -2.23 (-56.55) -2.9%
Sidewall Height inches (mm) 4.43 (112.5) 4.07 (103.5) -0.35 (-9) -8%
Revolutions per mile (km) 811.32 (504.13) 835.13 (518.93) 23.81 (14.79) 2.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.43 mph (31.27 km/h)
25 mph (40.23 km/h)24.29 mph (39.09 km/h)
30 mph (48.28 km/h)29.14 mph (46.9 km/h)
35 mph (56.33 km/h)34 mph (54.72 km/h)
40 mph (64.37 km/h)38.86 mph (62.54 km/h)
45 mph (72.42 km/h)43.72 mph (70.36 km/h)
50 mph (80.47 km/h)48.57 mph (78.17 km/h)
55 mph (88.51 km/h)53.43 mph (85.99 km/h)
60 mph (96.56 km/h)58.29 mph (93.81 km/h)
65 mph (104.61 km/h)63.15 mph (101.63 km/h)
70 mph (112.65 km/h)68 mph (109.44 km/h)
75 mph (120.7 km/h)72.86 mph (117.26 km/h)
80 mph (128.75 km/h)77.72 mph (125.08 km/h)
85 mph (136.79 km/h)82.58 mph (132.89 km/h)
90 mph (144.84 km/h)87.43 mph (140.71 km/h)
95 mph (152.89 km/h)92.29 mph (148.53 km/h)
100 mph (160.93 km/h)97.15 mph (156.35 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
21252469265927762903299330933210337335363717386241244413463947844865516455806484
Better Fuel Economy Factory Ratios Increased Power

Most Popular 125/90-R16 Comparisons

To Top