Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
155/80r13 vs 165/65r14 Tire Comparison Side By Side
  155/80-13 165/65-14 Difference
Diameter inches (mm) 22.76 (578.2) 22.44 (570.1) -0.32 (-8.1) -1.4%
Width inches (mm) 6.1 (155) 6.5 (165) 0.39 (10) 6.5%
Circum. inches (mm) 71.51 (1816.47) 70.51 (1791.02) -1 (-25.45) -1.4%
Sidewall Height inches (mm) 4.88 (124) 4.22 (107.25) -0.66 (-16.75) -13.5%
Revolutions per mile (km) 885.97 (550.52) 898.56 (558.34) 12.59 (7.82) 1.4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.72 mph (31.74 km/h)
25 mph (40.23 km/h)24.65 mph (39.67 km/h)
30 mph (48.28 km/h)29.58 mph (47.6 km/h)
35 mph (56.33 km/h)34.51 mph (55.54 km/h)
40 mph (64.37 km/h)39.44 mph (63.47 km/h)
45 mph (72.42 km/h)44.37 mph (71.41 km/h)
50 mph (80.47 km/h)49.3 mph (79.34 km/h)
55 mph (88.51 km/h)54.23 mph (87.27 km/h)
60 mph (96.56 km/h)59.16 mph (95.21 km/h)
65 mph (104.61 km/h)64.09 mph (103.14 km/h)
70 mph (112.65 km/h)69.02 mph (111.08 km/h)
75 mph (120.7 km/h)73.95 mph (119.01 km/h)
80 mph (128.75 km/h)78.88 mph (126.94 km/h)
85 mph (136.79 km/h)83.81 mph (134.88 km/h)
90 mph (144.84 km/h)88.74 mph (142.81 km/h)
95 mph (152.89 km/h)93.67 mph (150.75 km/h)
100 mph (160.93 km/h)98.6 mph (158.68 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
22872656286129873123322133283454362938053999415544374748499251475235555660046977
Better Fuel Economy Factory Ratios Increased Power

Most Popular 155/80-R13 Comparisons

To Top