Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
135/80r13 vs 195/45r15 Tire Comparison Side By Side
  135/80-13 195/45-15 Difference
Diameter inches (mm) 21.5 (546.2) 21.91 (556.5) 0.41 (10.3) 1.9%
Width inches (mm) 5.31 (135) 7.68 (195) 2.36 (60) 44.4%
Circum. inches (mm) 67.56 (1715.94) 68.83 (1748.3) 1.27 (32.36) 1.9%
Sidewall Height inches (mm) 4.25 (108) 3.45 (87.75) -0.8 (-20.25) -18.8%
Revolutions per mile (km) 937.88 (582.77) 920.52 (571.98) -17.36 (-10.79) -1.9%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.38 mph (32.79 km/h)
25 mph (40.23 km/h)25.47 mph (40.99 km/h)
30 mph (48.28 km/h)30.57 mph (49.19 km/h)
35 mph (56.33 km/h)35.66 mph (57.39 km/h)
40 mph (64.37 km/h)40.75 mph (65.59 km/h)
45 mph (72.42 km/h)45.85 mph (73.79 km/h)
50 mph (80.47 km/h)50.94 mph (81.98 km/h)
55 mph (88.51 km/h)56.04 mph (90.18 km/h)
60 mph (96.56 km/h)61.13 mph (98.38 km/h)
65 mph (104.61 km/h)66.23 mph (106.58 km/h)
70 mph (112.65 km/h)71.32 mph (114.78 km/h)
75 mph (120.7 km/h)76.41 mph (122.98 km/h)
80 mph (128.75 km/h)81.51 mph (131.18 km/h)
85 mph (136.79 km/h)86.6 mph (139.37 km/h)
90 mph (144.84 km/h)91.7 mph (147.57 km/h)
95 mph (152.89 km/h)96.79 mph (155.77 km/h)
100 mph (160.93 km/h)101.89 mph (163.97 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Better Fuel Economy Factory Ratios Increased Power

Most Popular 135/80-R13 Comparisons

To Top