Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
185/65r15 vs 195/70r14 Tire Comparison Side By Side
  185/65-15 195/70-14 Difference
Diameter inches (mm) 24.47 (621.5) 24.75 (628.6) 0.28 (7.1) 1.1%
Width inches (mm) 7.28 (185) 7.68 (195) 0.39 (10) 5.4%
Circum. inches (mm) 76.87 (1952.5) 77.75 (1974.81) 0.88 (22.31) 1.1%
Sidewall Height inches (mm) 4.73 (120.25) 5.37 (136.5) 0.64 (16.25) 13.5%
Revolutions per mile (km) 824.25 (512.16) 814.94 (506.38) -9.31 (-5.78) -1.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.23 mph (32.55 km/h)
25 mph (40.23 km/h)25.29 mph (40.69 km/h)
30 mph (48.28 km/h)30.34 mph (48.83 km/h)
35 mph (56.33 km/h)35.4 mph (56.97 km/h)
40 mph (64.37 km/h)40.46 mph (65.11 km/h)
45 mph (72.42 km/h)45.51 mph (73.25 km/h)
50 mph (80.47 km/h)50.57 mph (81.39 km/h)
55 mph (88.51 km/h)55.63 mph (89.53 km/h)
60 mph (96.56 km/h)60.69 mph (97.66 km/h)
65 mph (104.61 km/h)65.74 mph (105.8 km/h)
70 mph (112.65 km/h)70.8 mph (113.94 km/h)
75 mph (120.7 km/h)75.86 mph (122.08 km/h)
80 mph (128.75 km/h)80.91 mph (130.22 km/h)
85 mph (136.79 km/h)85.97 mph (138.36 km/h)
90 mph (144.84 km/h)91.03 mph (146.5 km/h)
95 mph (152.89 km/h)96.09 mph (154.63 km/h)
100 mph (160.93 km/h)101.14 mph (162.77 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
20742409259527092833292130183133329234513627376840244307452746684748503954456327
Better Fuel Economy Factory Ratios Increased Power

Most Popular 185/65-R15 Comparisons

To Top