Tire Size Calculator

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Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
205/50r10 vs 215/35r12 Tire Comparison Side By Side
  205/50-10 215/35-12 Difference
Diameter inches (mm) 18.07 (459) 17.93 (455.3) -0.15 (-3.7) -0.8%
Width inches (mm) 8.07 (205) 8.46 (215) 0.39 (10) 4.9%
Circum. inches (mm) 56.77 (1441.99) 56.31 (1430.37) -0.46 (-11.62) -0.8%
Sidewall Height inches (mm) 4.04 (102.5) 2.96 (75.25) -1.07 (-27.25) -26.6%
Revolutions per mile (km) 1116.06 (693.48) 1125.13 (699.12) 9.07 (5.64) 0.8%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)19.84 mph (31.93 km/h)
25 mph (40.23 km/h)24.8 mph (39.91 km/h)
30 mph (48.28 km/h)29.76 mph (47.89 km/h)
35 mph (56.33 km/h)34.72 mph (55.87 km/h)
40 mph (64.37 km/h)39.68 mph (63.85 km/h)
45 mph (72.42 km/h)44.64 mph (71.84 km/h)
50 mph (80.47 km/h)49.6 mph (79.82 km/h)
55 mph (88.51 km/h)54.56 mph (87.8 km/h)
60 mph (96.56 km/h)59.52 mph (95.78 km/h)
65 mph (104.61 km/h)64.48 mph (103.76 km/h)
70 mph (112.65 km/h)69.44 mph (111.75 km/h)
75 mph (120.7 km/h)74.4 mph (119.73 km/h)
80 mph (128.75 km/h)79.36 mph (127.71 km/h)
85 mph (136.79 km/h)84.31 mph (135.69 km/h)
90 mph (144.84 km/h)89.27 mph (143.67 km/h)
95 mph (152.89 km/h)94.23 mph (151.66 km/h)
100 mph (160.93 km/h)99.19 mph (159.64 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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