Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
130/70r12 vs 130/90r12 Tire Comparison Side By Side
  130/70-12 130/90-12 Difference
Diameter inches (mm) 19.17 (486.8) 21.21 (538.8) 2.05 (52) 10.7%
Width inches (mm) 5.12 (130) 5.12 (130) 0 (0) 0%
Circum. inches (mm) 60.21 (1529.33) 66.64 (1692.69) 6.43 (163.36) 10.7%
Sidewall Height inches (mm) 3.58 (91) 4.61 (117) 1.02 (26) 28.6%
Revolutions per mile (km) 1052.32 (653.88) 950.76 (590.77) -101.56 (-63.11) -9.7%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.14 mph (35.63 km/h)
25 mph (40.23 km/h)27.67 mph (44.53 km/h)
30 mph (48.28 km/h)33.2 mph (53.44 km/h)
35 mph (56.33 km/h)38.74 mph (62.34 km/h)
40 mph (64.37 km/h)44.27 mph (71.25 km/h)
45 mph (72.42 km/h)49.81 mph (80.16 km/h)
50 mph (80.47 km/h)55.34 mph (89.06 km/h)
55 mph (88.51 km/h)60.88 mph (97.97 km/h)
60 mph (96.56 km/h)66.41 mph (106.88 km/h)
65 mph (104.61 km/h)71.94 mph (115.78 km/h)
70 mph (112.65 km/h)77.48 mph (124.69 km/h)
75 mph (120.7 km/h)83.01 mph (133.59 km/h)
80 mph (128.75 km/h)88.55 mph (142.5 km/h)
85 mph (136.79 km/h)94.08 mph (151.41 km/h)
90 mph (144.84 km/h)99.61 mph (160.31 km/h)
95 mph (152.89 km/h)105.15 mph (169.22 km/h)
100 mph (160.93 km/h)110.68 mph (178.13 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
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