Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/80r16 vs 345/65r16 Tire Comparison Side By Side
  255/80-16 345/65-16 Difference
Diameter inches (mm) 32.06 (814.4) 33.66 (854.9) 1.59 (40.5) 5%
Width inches (mm) 10.04 (255) 13.58 (345) 3.54 (90) 35.3%
Circum. inches (mm) 100.73 (2558.51) 105.74 (2685.75) 5.01 (127.23) 5%
Sidewall Height inches (mm) 8.03 (204) 8.83 (224.25) 0.8 (20.25) 9.9%
Revolutions per mile (km) 629.02 (390.85) 599.22 (372.34) -29.8 (-18.52) -4.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.99 mph (33.79 km/h)
25 mph (40.23 km/h)26.24 mph (42.23 km/h)
30 mph (48.28 km/h)31.49 mph (50.68 km/h)
35 mph (56.33 km/h)36.74 mph (59.13 km/h)
40 mph (64.37 km/h)41.99 mph (67.58 km/h)
45 mph (72.42 km/h)47.24 mph (76.02 km/h)
50 mph (80.47 km/h)52.49 mph (84.47 km/h)
55 mph (88.51 km/h)57.74 mph (92.92 km/h)
60 mph (96.56 km/h)62.98 mph (101.36 km/h)
65 mph (104.61 km/h)68.23 mph (109.81 km/h)
70 mph (112.65 km/h)73.48 mph (118.26 km/h)
75 mph (120.7 km/h)78.73 mph (126.7 km/h)
80 mph (128.75 km/h)83.98 mph (135.15 km/h)
85 mph (136.79 km/h)89.23 mph (143.6 km/h)
90 mph (144.84 km/h)94.48 mph (152.04 km/h)
95 mph (152.89 km/h)99.72 mph (160.49 km/h)
100 mph (160.93 km/h)104.97 mph (168.94 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
15251771190819922083214822192304242025372667277129593167332934333491370540044653
Better Fuel Economy Factory Ratios Increased Power

Most Popular 255/80-R16 Comparisons

To Top