Rated for 225 mph. And can take the force of 130,000+ pounds of 737 impacting the concrete runway at a few hundred feet per second descent and regularly at 160+ knots (180mph) if need be. That is, for as many smoky instances of 0 to 1200 rpm that it can take until the rubber cap wears to the threads. Ive seen 160psi in these things. Im now a believer in that some things truly are created with Pure (F)effing Magic. Praise be to engineers.