Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
165/60r12 vs 165/50r13 Tire Comparison Side By Side
  165/60-12 165/50-13 Difference
Diameter inches (mm) 19.8 (502.8) 19.5 (495.2) -0.3 (-7.6) -1.5%
Width inches (mm) 6.5 (165) 6.5 (165) 0 (0) 0%
Circum. inches (mm) 62.19 (1579.59) 61.25 (1555.72) -0.94 (-23.88) -1.5%
Sidewall Height inches (mm) 3.9 (99) 3.25 (82.5) -0.65 (-16.5) -16.7%
Revolutions per mile (km) 1018.83 (633.07) 1034.47 (642.79) 15.64 (9.72) 1.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.7 mph (31.7 km/h)
25 mph (40.23 km/h)24.62 mph (39.63 km/h)
30 mph (48.28 km/h)29.55 mph (47.55 km/h)
35 mph (56.33 km/h)34.47 mph (55.48 km/h)
40 mph (64.37 km/h)39.4 mph (63.4 km/h)
45 mph (72.42 km/h)44.32 mph (71.33 km/h)
50 mph (80.47 km/h)49.24 mph (79.25 km/h)
55 mph (88.51 km/h)54.17 mph (87.18 km/h)
60 mph (96.56 km/h)59.09 mph (95.1 km/h)
65 mph (104.61 km/h)64.02 mph (103.03 km/h)
70 mph (112.65 km/h)68.94 mph (110.95 km/h)
75 mph (120.7 km/h)73.87 mph (118.88 km/h)
80 mph (128.75 km/h)78.79 mph (126.8 km/h)
85 mph (136.79 km/h)83.72 mph (134.73 km/h)
90 mph (144.84 km/h)88.64 mph (142.65 km/h)
95 mph (152.89 km/h)93.56 mph (150.58 km/h)
100 mph (160.93 km/h)98.49 mph (158.5 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 165/60-R12 Comparisons

To Top