Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
125/65r12 vs 130/70r12 Tire Comparison Side By Side
  125/65-12 130/70-12 Difference
Diameter inches (mm) 18.4 (467.3) 19.17 (486.8) 0.77 (19.5) 4.2%
Width inches (mm) 4.92 (125) 5.12 (130) 0.2 (5) 4%
Circum. inches (mm) 57.8 (1468.07) 60.21 (1529.33) 2.41 (61.26) 4.2%
Sidewall Height inches (mm) 3.2 (81.25) 3.58 (91) 0.38 (9.75) 12%
Revolutions per mile (km) 1096.23 (681.17) 1052.32 (653.88) -43.91 (-27.29) -4%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)20.83 mph (33.53 km/h)
25 mph (40.23 km/h)26.04 mph (41.91 km/h)
30 mph (48.28 km/h)31.25 mph (50.3 km/h)
35 mph (56.33 km/h)36.46 mph (58.68 km/h)
40 mph (64.37 km/h)41.67 mph (67.06 km/h)
45 mph (72.42 km/h)46.88 mph (75.44 km/h)
50 mph (80.47 km/h)52.09 mph (83.83 km/h)
55 mph (88.51 km/h)57.3 mph (92.21 km/h)
60 mph (96.56 km/h)62.5 mph (100.59 km/h)
65 mph (104.61 km/h)67.71 mph (108.97 km/h)
70 mph (112.65 km/h)72.92 mph (117.36 km/h)
75 mph (120.7 km/h)78.13 mph (125.74 km/h)
80 mph (128.75 km/h)83.34 mph (134.12 km/h)
85 mph (136.79 km/h)88.55 mph (142.5 km/h)
90 mph (144.84 km/h)93.76 mph (150.89 km/h)
95 mph (152.89 km/h)98.96 mph (159.27 km/h)
100 mph (160.93 km/h)104.17 mph (167.65 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
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
Better Fuel Economy Factory Ratios Increased Power

Most Popular 125/65-R12 Comparisons

To Top