The No Tubes Rim Strips.Custom rim strip with a presta valve and removable core to be used with ZTR Olympic, ZTR 355, and ZTR 355 29er rims, Arch, Arch 29erOther rim strips will not work with the ZTR Olympic, 355, or 355 29er rims, Arch, Arch 29erRemovable valve core allows for easier application of tire sealantOther rim strips will not work with the ZTR Olympic, 355, or 355 29er rims, Arch, Arch 29erOnly 38 gramsIncludes one rim strip; this alone will not convert conventional rims and tires to a tubeless system