Tire Pressure Gauge Accuracy?
#1
Tire Pressure Gauge Accuracy?
My old tire gauge died- battery dead, not replaceable. So I went to Auto Zone for a new one.
They had three- a Slime brand (yeah, I know, weird name, but I bought one of their air pumps and it works fine) 0-150 psi, 2 lb accuracy, 0-99 1 lb accuracy and a $2 pencil-type one that works on pressure, not electricity.
Bought the first and the third (figuring for two bucks why not have a back-up).
They disagree consistently by 2 lbs (Slime's 2 lbs lower).
Any guess which one's right? Or how I'd go about testing them?
They had three- a Slime brand (yeah, I know, weird name, but I bought one of their air pumps and it works fine) 0-150 psi, 2 lb accuracy, 0-99 1 lb accuracy and a $2 pencil-type one that works on pressure, not electricity.
Bought the first and the third (figuring for two bucks why not have a back-up).
They disagree consistently by 2 lbs (Slime's 2 lbs lower).
Any guess which one's right? Or how I'd go about testing them?
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