No flats joes eco tubeless system xc narrow joes tubeless system is the most important upgrade available for a dedicated cyclist no flats joes eco tubeless system xc narrow features fits all narrow xc rims 15 17 mm inner rim width color coded white joes xc narrow tubeless rim strip is compatible with mavic xc 717 dt swiss xr 41 and other narrow xc rims weight 40 grams per strip including valve this kit contains all you need to convert your standard rims and tires to tubeless fo