Ircs serac cx tubeless offers the traction and control of a tubular with the versatility and convenience of a clincher the combination of ircs secure bead and supple casing creates a fast and reliable tire thats ready for any course when the forecast calls for mud ircs serac cx mud tubeless has what it takes to keep you in control tubeless tires allow the low pressures and outstanding control of a tubular with the simplicity and versatility of a clincher ircs secure bead and supple cas