The Self Inflating Tyre (SIT) system is a new invention of CODA Development, a company based in Prague, Czech Republic. SIT is an integral tyre feature that uses atmospheric air to inflate the tyre automatically when a vehicle is put in motion, compensating for natural loss of pressure and ensuring maintenance-free, constant tyre pressure over the lifetime of the tyre.

The SIT system is based on proven, highly reliable peristaltic pump principles. It integrates a tube chamber into the tyre wall. As the tyre turns against the road this chamber acts as a peristaltic pump, forcing more air into the tyre until it reaches its desired pressure. Then a managing valve automatically stops further inflation. This ensures that all tyres operate at optimal pressure at all times. Driving less than 1 mile compensates for typical leakage of 1 to 3% per month.

Incorrect tyre pressure contributes to higher fuel consumption, shorter tyre life, and accidents caused by under inflated tyres. In the US, it is estimated that maintaining proper tyre pressure would save upwards of 1.24 billion gallons of fuel annually by improving gas mileage. In turn, this would eliminate about 250 lbs. of carbon dioxide emissions per vehicle every year.