Saturday, Apr 10, 2010 at 15:57
G'day Everyone
Zacc ~ the Tyredogs are quite accurate, but as Graham H suggests the typical high use service station air pressure gauge is next to usless, for what would be an accurate pressure reading.
If you are very particular about your tyres and the pressures you choose to run them at, buy a good quality manual pressure gauge from a major tyre outlet,
check the tyre pressure sensors against the gauge reading and it can still be anything up to 2 PSI out.
The modern technology tyre sensors are very accurate ~ but still have a small percentage error rate, not enough to be critical though.
The 4 PSI rule is a good measurement system also, it was in use long before any form of electronic pressure monitoring system.
The 4 PSI rule or method involves checking tyre pressures cold ~ then driving a prescribed distance ~ (X Kilometres ) or until the vehicle has reached normal operating temperatures ~ re
check tyre pressures ~ if there is a rise of more than 4 PSI the initial pressure(s) readings, were low, to begin with.
It is not a complicated method, just time consuming, but once mastered, its simple and accurate.
Mr Jol Flemming ~ a four wheel drive training/tour operator advocates the tyre foot print method, this is also a good method of adjusting tyre pressures to the load and terrain. www.direct4wd.com.au Again a relatively simple but very accurate method of ~ pressure(s) x load x terrain.
The electronic monitoring system(s) are always monitoring and almost instant in feed back to the vehicle operator.
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