Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
29.5/10.5r15 vs 265/70r16 Tire Comparison Side By Side
  29.5/10.5-15 265/70-16 Difference
Diameter inches (mm) 29.51 (749.46) 30.61 (777.4) 1.1 (27.94) 3.7%
Width inches (mm) 10.51 (267) 10.43 (265) -0.08 (-2) -0.7%
Circum. inches (mm) 92.7 (2354.5) 96.15 (2442.27) 3.46 (87.78) 3.7%
Sidewall Height inches (mm) 7.25 (184.23) 7.3 (185.5) 0.05 (1.27) 0.7%
Revolutions per mile (km) 683.52 (424.72) 658.95 (409.45) -24.57 (-15.26) -3.6%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.75 mph (33.39 km/h)
25 mph (40.23 km/h)25.93 mph (41.73 km/h)
30 mph (48.28 km/h)31.12 mph (50.08 km/h)
35 mph (56.33 km/h)36.3 mph (58.43 km/h)
40 mph (64.37 km/h)41.49 mph (66.77 km/h)
45 mph (72.42 km/h)46.68 mph (75.12 km/h)
50 mph (80.47 km/h)51.86 mph (83.47 km/h)
55 mph (88.51 km/h)57.05 mph (91.81 km/h)
60 mph (96.56 km/h)62.24 mph (100.16 km/h)
65 mph (104.61 km/h)67.42 mph (108.51 km/h)
70 mph (112.65 km/h)72.61 mph (116.85 km/h)
75 mph (120.7 km/h)77.8 mph (125.2 km/h)
80 mph (128.75 km/h)82.98 mph (133.55 km/h)
85 mph (136.79 km/h)88.17 mph (141.89 km/h)
90 mph (144.84 km/h)93.36 mph (150.24 km/h)
95 mph (152.89 km/h)98.54 mph (158.59 km/h)
100 mph (160.93 km/h)103.73 mph (166.93 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
16771948209821912291236224402533266227902933304732543482366137753839407544035116
Better Fuel Economy Factory Ratios Increased Power

Most Popular 29.5/10.5-R15 Comparisons

To Top