User's Manual

5 | P a g e
On the other hand, an overinflated tire will cause accelerated wear on the center
portion of the tire resulting in uneven tire wear. It would also result in a harsher ride
and makes the tire more susceptible to damage when going over potholes or debris
on the road..
What is the optimum tire pressure? There are a lot of information about this subject
in internet forums and web articles. A quick guide for better understanding of tire
pressure below:-
1) Vehicle manufacturers recommend the optimum tire pressure for their
vehicle models. The information is usually available on a sticker at the door
jam (side of the driver‟s door) or in the owner‟s manual. For some vehicle
models, the information sticker may be on the trunk lid or on the fuel door.
Vehicle manufacturers usually recommend different tire pressure for front
and rear axles. This pressure is usually recommended for comfort driving
and optimum performance of the vehicle. It is not advisable to go below this
recommended pressure level.
2) The vehicle manufacturer recommended tire pressure is “cold pressure”.
When you drive your vehicle to the gas station, the friction on the road will
heat up your vehicle tires within a few minutes. Typically there will 1 psi
(~7kPa) increase in air pressure for every 10 deg F (5.6 deg C) rise in
temperature. It is advisable to inflate the tire pressure with this compensated
pressure above the recommended pressure.
3) Air pressure in tires is affected by changes in temperature. Check and adjust
your tire pressure whenever there is a drastic change in environment
temperature, e.g. Change of season.
4) A tire will normally lose its pressure through natural causes unless
accelerated by a puncture, faulty valve or damaged wheels. It is advisable to
change the tire valves or at least check the valves condition every time you
change a new set of tires. Under normal condition, a set of tires could
deflate at a rate of up to 2psi per month. It is good practice to check your tire
pressure regularly and top up to the optimum pressure.
5) Every vehicle tire has a maximum inflation pressure. It is not advisable to
inflate to the maximum inflation pressure of the tire. Follow the vehicle
manufacturer‟s recommended tire pressure instead.