calibrating bigger tires
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Your Edge can calibrate for bigger tires. Although itll only show the correct speed on your Attitude monitor.
The numbers on this screen represent the circumference of your tire in mm. Adjust the
tire size by pressing the up/down arrow keys. The table below will help you determine
your wheel circumference by matching your tire size with the sizes listed. For example,
if your tire size is 285/ 65/ 18R, the value (circumference) you enter into the Attitude is
2599.0. Another alternative is to measure your tire’s circumference by marking your tire
and rolling it one complete revolution and measuring the distance then multiply the
inches by 25.4 (i.e., 91.3 inches x 25.4 = 2319.0 mm). The tire size chart is on the
following page.
Width Ratio
Rim Circumference
215 75 16 2288.8 mm (select 2300)
245 75 16 2430.0 mm
265 75 16 2524.2 mm
285 75 16 2618.4 mm
295 75 16 2665.5 mm
305 75 16 2712.6 mm
315 75 16 2759.7 mm
325 75 16 2806.8 mm
265 70 17 2520.8 mm
285 75 17 2698.2 mm
315 75 17 2839.5 mm
285 65 18 2599.0 mm
285 60 18 2509.5 mm
325 60 18 2660.2 mm
265 70 16 2441.0 mm
275 70 16 2485.0 mm
305 70 16 2616.9 mm
Tire Size
33 2631.9 mm
35 2791.5 mm
37 2951.0 mm
38 3030.7 mm
The numbers on this screen represent the circumference of your tire in mm. Adjust the
tire size by pressing the up/down arrow keys. The table below will help you determine
your wheel circumference by matching your tire size with the sizes listed. For example,
if your tire size is 285/ 65/ 18R, the value (circumference) you enter into the Attitude is
2599.0. Another alternative is to measure your tire’s circumference by marking your tire
and rolling it one complete revolution and measuring the distance then multiply the
inches by 25.4 (i.e., 91.3 inches x 25.4 = 2319.0 mm). The tire size chart is on the
following page.
Width Ratio
Rim Circumference
215 75 16 2288.8 mm (select 2300)
245 75 16 2430.0 mm
265 75 16 2524.2 mm
285 75 16 2618.4 mm
295 75 16 2665.5 mm
305 75 16 2712.6 mm
315 75 16 2759.7 mm
325 75 16 2806.8 mm
265 70 17 2520.8 mm
285 75 17 2698.2 mm
315 75 17 2839.5 mm
285 65 18 2599.0 mm
285 60 18 2509.5 mm
325 60 18 2660.2 mm
265 70 16 2441.0 mm
275 70 16 2485.0 mm
305 70 16 2616.9 mm
Tire Size
33 2631.9 mm
35 2791.5 mm
37 2951.0 mm
38 3030.7 mm
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