What is SIT?

SIT is an integral tire component that uses atmospheric air to automatically inflate the tire while it is used. This ensures maintenance-free, constant tire pressure over the lifetime of the tire.

When a vehicle equipped with SIT tires is put in motion, under-inflated tires will gradually re-inflate, reducing risks derived from natural loss of pressure or small tire punctures.

The inflation stops automatically once the desired tire pressure is reached.

Driving for less than 1 mile would compensate for typical leakage of 1 to 3% per month.

How important is tire pressure?

Tires commonly leak slowly and unnoticeably. In the USA, 27% of passenger cars and 32% of light trucks and SUVs have at least one tire under-pressured by more than 25%. Under-inflated tires negatively impact:

• SAFETY
  • In the United States, 660 lives are lost and 33,000 are injured every year.
  • 87% of all flat tires have a history of under inflation
• FUEL ECONOMY
  • Poor tire pressure costs the US an extra $3.7 billion in fuel annually.
• TIRE LONGEVITY
  • Every year in the US, 4.5 million tires need to be replaced before their designed lifespan.

Percentage of Under-inflation	Percentage of wear increase	Percentage of fuel use increase
10%	5%	2%
20%	16%	4%
30%	33%	6%