Tire Size Calculator

Tire Size Finder (optional):

Stock Sizes

  • 255/75-16

Plus Sizes

  • 255/75-16

Accepts P-Metric and Inches
/ R
/ R
235/50r15 vs 235/70r14 Tire Comparison Side By Side
  235/50-15 235/70-14 Difference
Diameter inches (mm) 24.25 (616) 26.95 (684.6) 2.7 (68.6) 11.1%
Width inches (mm) 9.25 (235) 9.25 (235) 0 (0) 0%
Circum. inches (mm) 76.19 (1935.22) 84.67 (2150.73) 8.48 (215.51) 11.1%
Sidewall Height inches (mm) 4.63 (117.5) 6.48 (164.5) 1.85 (47) 40%
Revolutions per mile (km) 831.61 (516.74) 748.28 (464.96) -83.33 (-51.78) -10%

Speedometer Difference

Speedo Reading Actual Speed
20 mph (32.19 km/h)22.23 mph (35.77 km/h)
25 mph (40.23 km/h)27.78 mph (44.71 km/h)
30 mph (48.28 km/h)33.34 mph (53.66 km/h)
35 mph (56.33 km/h)38.9 mph (62.6 km/h)
40 mph (64.37 km/h)44.45 mph (71.54 km/h)
45 mph (72.42 km/h)50.01 mph (80.49 km/h)
50 mph (80.47 km/h)55.57 mph (89.43 km/h)
55 mph (88.51 km/h)61.13 mph (98.37 km/h)
60 mph (96.56 km/h)66.68 mph (107.31 km/h)
65 mph (104.61 km/h)72.24 mph (116.26 km/h)
70 mph (112.65 km/h)77.8 mph (125.2 km/h)
75 mph (120.7 km/h)83.35 mph (134.14 km/h)
80 mph (128.75 km/h)88.91 mph (143.09 km/h)
85 mph (136.79 km/h)94.47 mph (152.03 km/h)
90 mph (144.84 km/h)100.02 mph (160.97 km/h)
95 mph (152.89 km/h)105.58 mph (169.91 km/h)
100 mph (160.93 km/h)111.14 mph (178.86 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
19042212238224882601268227712877302231683330346036953954415742874359462750005810
Better Fuel Economy Factory Ratios Increased Power

Most Popular 235/50-R15 Comparisons

To Top