Stans no tubes ztr grail disc rimfrom our much copied wider rim design to our groundbreaking bead socket technology rim profile weve made a habit of thinking outside the box section when it comes to rim design our new grail continues the notubes tradition of function first innovation countless hours spent working with our professional road racers and cyclocross team led us to create what just might be the ultimate disc specific rim for road cross and gravel featuressize 700c x 24 1mmvaria