ALLIGATOR TPMS snap-in valve for Schrader Low Speed ??(U2, VS-950, 20008, 20018). Snap-in valves for tire pressure sensors are exposed to significantly higher loads than standard snap-in valves. It is therefore necessary to change the TPMS snap-in valves every time the tires are changed. The TPMS snap-in valve for the sens.it sensor RS4 is limited to speeds of less than 210 km / h and is therefore reccomended to use it only for replacing the TPMS snap-in installed at the factory Note: Use this valve only with the corresponding sens.it sensor.