The air we breathe consists mainly of Nitrogen 79%, and oxygen 21%. When your tyres are filled up, compressed air containing these two gases is blown into the tyre. A modern tyre doesn't have a tube (like a bicycle tyre) but has on the inside of the tyre a Butyl (rubber) liner which keeps the air in tyre. When compressed air is put into your tyres at the tyre centre or a garage, water in the air is also blown into the tyre accidently as the compressed air is deemed to be wet. The presence of water and oxygen slowly corrodes the internal tyre rim where the tyre sits causing poor sealing and a "Slow puncture " effect. As alloys get older this becomes more pronounced. Oxygen is also able to permeate through the butyl liner quicker than nitrogen and so a tyre with no leaks gradually loses pressure.
Your car owners book probably tells you to check your pressures weekly or monthly.
In reality how often do you check your pressures ?
Run flat tyres and ultra low profile tyres (<50% aspect ratio) don't sit and look soft until they are almost empty of pressure. This can be very dangerous. An under inflated tyre causes several problems .
Road contact is reduced in the middle of the tyre where the majority of the tread block is, meaning in wet weather grip is drastically reduced.
An underinflated tyre will rapidly overheat overloading the tyre walls and can lead to structural tyre failure (Blow out !!)
Less seriously an under-inflated tyres life can be shortened by 25% or more and
Fuel consumption will rapidly increase by 10% or more .
Nitrogen in Tyres
Q Is it a gimmick ?
Q I've never heard of this before?
Q What's wrong with air anyway ? (See above)
Nitrogen in Tyres is no gimmick The moon buggy in 1969-70 used nitrogen in its tyres,
Commercial aircraft will ONLY put Nitrogen in the aircraft tyres
Formula 1 teams have been using Nitrogen in their tyres since 1992 and their tyres typically only last 60 miles !!
Tyres can use air or nitrogen obviously you will get full benefit if all your tyres are correctly filled with nitrogen.
Can I refill a nitrogen tyre with air ? Yes you can top it up or refill with air but obviously you then loose the benefit of having nitrogen in the tyre.
We charge £ 2.00 /tyre. Your vehicle is parked by our machine and its weight is taken by a couple of jacks to prevent damage to your tyres. Your tyre valves are removed to release the air. Once emptied the valves are refitted and the tyre is then inflated to the correct pressure for your tyre. We then fit if requested a green dust cap and make a note of your vehicle and tyres. Top ups of nitrogen with those tyres are then free (Providing your tyres do not have a puncture rim seal or valve leak on them) your tyre should not lose pressure as per previously and you should start to save money in fuel and tyre life straight away.
Move over to Nitrogen its the future !!
How much can I save in a year?
Assuming 10,000 miles/annum @40mpg that's 250 gallons/yr or @ £5.50 (£ 1.21/l) = £ 1,375.
For every 10% fuel saving = £ 137.5
Tyre costs assume £ 55/tyre and you buy 2 tyres /yr = £ 110/yr
For every 10% tyre life saving = £ 11/yr
So even if you check your tyres once per month you can expect a £150/yr saving.
All for a one off cost of £ 8-00