The tyre pressure gauge contained in this kit has a range of 10 -50 psi and accuracy of 2-3 psi.
Directions (Pressure Gauge)
1.to use, ensure that the gauge is set to zero
2. push the nozzle onto the tyre valve so that a good seal is made between the valve and nozzle
( failure to do so can lead to a inaccurate reading)
3. once the nozzle is correctly applied wait for the pressure reading to stabilise then remove the gauge from the valve stem then read the measurement
(Tread depth tester)
the tyre tread depth is graduated from 0-24mm with a mark indicating the current legal limit
when the tyre depth meter reaches 2.2mm you should look into replacing your old tyres
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