Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
265/70r19.5 vs 305/70r19.5 Tire Comparison Side By Side
  265/70-19.5 305/70-19.5 Difference
Diameter inches (mm) 34.11 (866.3) 36.31 (922.3) 2.2 (56) 6.5%
Width inches (mm) 10.43 (265) 12.01 (305) 1.57 (40) 15.1%
Circum. inches (mm) 107.15 (2721.56) 114.07 (2897.49) 6.93 (175.93) 6.5%
Sidewall Height inches (mm) 7.3 (185.5) 8.41 (213.5) 1.1 (28) 15.1%
Revolutions per mile (km) 591.33 (367.44) 555.43 (345.13) -35.9 (-22.31) -6.1%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)21.29 mph (34.27 km/h)
25 mph (40.23 km/h)26.62 mph (42.83 km/h)
30 mph (48.28 km/h)31.94 mph (51.4 km/h)
35 mph (56.33 km/h)37.26 mph (59.97 km/h)
40 mph (64.37 km/h)42.59 mph (68.54 km/h)
45 mph (72.42 km/h)47.91 mph (77.1 km/h)
50 mph (80.47 km/h)53.23 mph (85.67 km/h)
55 mph (88.51 km/h)58.56 mph (94.24 km/h)
60 mph (96.56 km/h)63.88 mph (102.8 km/h)
65 mph (104.61 km/h)69.2 mph (111.37 km/h)
70 mph (112.65 km/h)74.52 mph (119.94 km/h)
75 mph (120.7 km/h)79.85 mph (128.5 km/h)
80 mph (128.75 km/h)85.17 mph (137.07 km/h)
85 mph (136.79 km/h)90.49 mph (145.64 km/h)
90 mph (144.84 km/h)95.82 mph (154.2 km/h)
95 mph (152.89 km/h)101.14 mph (162.77 km/h)
100 mph (160.93 km/h)106.46 mph (171.34 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
14131642176818471931199120572135224323522472256827432935308631823236343437114313
Better Fuel Economy Factory Ratios Increased Power

Most Popular 265/70-R19.5 Comparisons

To Top