Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
245/75r17 vs 245/65r17 Tire Comparison Side By Side
  245/75-17 245/65-17 Difference
Diameter inches (mm) 31.47 (799.3) 29.54 (750.3) -1.93 (-49) -6.1%
Width inches (mm) 9.65 (245) 9.65 (245) 0 (0) 0%
Circum. inches (mm) 98.86 (2511.08) 92.8 (2357.14) -6.06 (-153.94) -6.1%
Sidewall Height inches (mm) 7.23 (183.75) 6.27 (159.25) -0.96 (-24.5) -13.3%
Revolutions per mile (km) 640.9 (398.24) 682.75 (424.24) 41.86 (26.01) 6.5%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)18.77 mph (30.21 km/h)
25 mph (40.23 km/h)23.47 mph (37.77 km/h)
30 mph (48.28 km/h)28.16 mph (45.32 km/h)
35 mph (56.33 km/h)32.85 mph (52.87 km/h)
40 mph (64.37 km/h)37.55 mph (60.43 km/h)
45 mph (72.42 km/h)42.24 mph (67.98 km/h)
50 mph (80.47 km/h)46.93 mph (75.53 km/h)
55 mph (88.51 km/h)51.63 mph (83.09 km/h)
60 mph (96.56 km/h)56.32 mph (90.64 km/h)
65 mph (104.61 km/h)61.02 mph (98.19 km/h)
70 mph (112.65 km/h)65.71 mph (105.75 km/h)
75 mph (120.7 km/h)70.4 mph (113.3 km/h)
80 mph (128.75 km/h)75.1 mph (120.86 km/h)
85 mph (136.79 km/h)79.79 mph (128.41 km/h)
90 mph (144.84 km/h)84.48 mph (135.96 km/h)
95 mph (152.89 km/h)89.18 mph (143.52 km/h)
100 mph (160.93 km/h)93.87 mph (151.07 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
17372018217422702373244725292625275828913039315733713608379339113978422245625301
Better Fuel Economy Factory Ratios Increased Power

Most Popular 245/75-R17 Comparisons

To Top