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Nitrogen


Nitrogen is the best possible tyre gas. Tyres inflated with nitrogen run between 10 and 15% cooler. Tyres inflated with air run hotter than those inflated with nitrogen. Nitrogen disperses heat quicker than air. Tyres run cooler and tyre life is extended by up to 20%. Tyres inflated with nitrogen do not lose pressure as quickly as those filled with air.

If there is no damage to the rim or tyre, the pressure will remain constant, because air migrates faster through a tyre than nitrogen. Tyres inflated with nitrogen should be inflated to the same pressure as air. i.e.: the manufacturer’s recommended tyre pressure for the vehicle. You can top up with air, air is already 78% nitrogen, mixing the two will not cause damage to the tyre. You can re-inflate to 100% nitrogen at your convenience. Cooler running tyres, with constant pressures, make them last longer.

 

Tyre Balancing

Tyre Balance

To ensure your tyre tread remains in constant contact with the road, the wheel and tyre have to be correctly balanced.

Imagine your vehicle is raised off the ground and the wheel spun by hand, an unbalanced wheel would always stop at the same point - with the heavier imbalance being at the bottom of the wheel.

On the road, wheel imbalance can lift the tyre from contact with the road creating vibration through the steering wheel and causing problems with steering and braking. Damage to the suspension, wheel bearings and steering components can occur if the imbalance is left unattended.

Static imbalance occurs when there is a heavy or light spot in the tyre so that the tyre won't roll evenly and the tyre and wheel undergoes an up-and-down motion.

Dynamic imbalance occurs when there is unequal weight on one or both sides of the tyre/wheel assembly's lateral centreline, thus creating a side-to-side wobble or wheel shimmy.

Incorrect wheel balance is easily corrected by using a computerised electronic wheel balancer to measure the imbalance, and then by adding small metal weights to even things up.

 

Tyre Profile


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P

Passenger car tyre. If there is no P before the size it would indicate it is a European metric tyre. An LT before the size would designate a light truck tyre

205

This is the Section Width in millimetres. This measurement is taken from sidewall to sidewall

65

This number refers to the height of the sidewall, or the Aspect Ratio. It is a percentage of the section width. In this example, you would take 65 percent of 205 millimetres & this would give you the sidewall height

RRR Radial tyre construction
15 Wheel dia in inches
89 Load capacity
H Speed rating
 

 

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