Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
255/50r20 vs 265/55r20 Tire Comparison Side By Side
  255/50-20 265/55-20 Difference
Diameter inches (mm) 30.04 (763) 31.48 (799.5) 1.44 (36.5) 4.8%
Width inches (mm) 10.04 (255) 10.43 (265) 0.39 (10) 3.9%
Circum. inches (mm) 94.37 (2397.04) 98.89 (2511.7) 4.51 (114.67) 4.8%
Sidewall Height inches (mm) 5.02 (127.5) 5.74 (145.75) 0.72 (18.25) 14.3%
Revolutions per mile (km) 671.39 (417.18) 640.74 (398.14) -30.65 (-19.05) -4.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.96 mph (33.73 km/h)
25 mph (40.23 km/h)26.2 mph (42.16 km/h)
30 mph (48.28 km/h)31.44 mph (50.59 km/h)
35 mph (56.33 km/h)36.67 mph (59.02 km/h)
40 mph (64.37 km/h)41.91 mph (67.45 km/h)
45 mph (72.42 km/h)47.15 mph (75.89 km/h)
50 mph (80.47 km/h)52.39 mph (84.32 km/h)
55 mph (88.51 km/h)57.63 mph (92.75 km/h)
60 mph (96.56 km/h)62.87 mph (101.18 km/h)
65 mph (104.61 km/h)68.11 mph (109.61 km/h)
70 mph (112.65 km/h)73.35 mph (118.04 km/h)
75 mph (120.7 km/h)78.59 mph (126.48 km/h)
80 mph (128.75 km/h)83.83 mph (134.91 km/h)
85 mph (136.79 km/h)89.07 mph (143.34 km/h)
90 mph (144.84 km/h)94.31 mph (151.77 km/h)
95 mph (152.89 km/h)99.54 mph (160.2 km/h)
100 mph (160.93 km/h)104.78 mph (168.63 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
16311894204021302227229723732463258827132852296331643386355936703733396242814975
Better Fuel Economy Factory Ratios Increased Power

Most Popular 255/50-R20 Comparisons

To Top