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My tests.
Verified the odometer by the mile posts:
1. On the road = 15 miles; on the odometer = 21.46 km (13.33 miles); Error - 11.1%
2. On the road = 11miles; on the odometer = 15.75 km (9.79 miles); Error - 11.0%
Calculated average correction/conversion coefficient of the speedometer readings to the miles is: 1.4312 (FYI 1 mile=1.609344 km)
Speedometer has been verified with GPS. Actual readings:
35 mph at GPS=32 mph (error = +9.4%)
38 mph at GPS=35 mph (error = +8.6%)
40 mph at GPS=36 mph (error = +11.1%)
44 mph at GPS=40 mph (error = +10.0%)
54 mph at GPS=50 mph (error = +8.0%)
The tire pressure was: front 22 PSI; rear 32 PSI, temperature 24C, tires: Shinko 705
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