Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/70r18 vs 135/90r16 Tire Comparison Side By Side
  135/70-18 135/90-16 Difference
Diameter inches (mm) 25.44 (646.2) 25.57 (649.4) 0.13 (3.2) 0.5%
Width inches (mm) 5.31 (135) 5.31 (135) 0 (0) 0%
Circum. inches (mm) 79.93 (2030.1) 80.32 (2040.15) 0.4 (10.05) 0.5%
Sidewall Height inches (mm) 3.72 (94.5) 4.78 (121.5) 1.06 (27) 28.6%
Revolutions per mile (km) 792.74 (492.59) 788.84 (490.16) -3.91 (-2.43) -0.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.1 mph (32.35 km/h)
25 mph (40.23 km/h)25.12 mph (40.43 km/h)
30 mph (48.28 km/h)30.15 mph (48.52 km/h)
35 mph (56.33 km/h)35.17 mph (56.61 km/h)
40 mph (64.37 km/h)40.2 mph (64.69 km/h)
45 mph (72.42 km/h)45.22 mph (72.78 km/h)
50 mph (80.47 km/h)50.25 mph (80.87 km/h)
55 mph (88.51 km/h)55.27 mph (88.95 km/h)
60 mph (96.56 km/h)60.3 mph (97.04 km/h)
65 mph (104.61 km/h)65.32 mph (105.13 km/h)
70 mph (112.65 km/h)70.35 mph (113.21 km/h)
75 mph (120.7 km/h)75.37 mph (121.3 km/h)
80 mph (128.75 km/h)80.4 mph (129.39 km/h)
85 mph (136.79 km/h)85.42 mph (137.47 km/h)
90 mph (144.84 km/h)90.45 mph (145.56 km/h)
95 mph (152.89 km/h)95.47 mph (153.65 km/h)
100 mph (160.93 km/h)100.5 mph (161.73 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
20072332251126222742282729213033318633403511364838954169438245194596487852716125
Better Fuel Economy Factory Ratios Increased Power

Most Popular 135/70-R18 Comparisons

To Top