This is a custom rim strip with a presta valve and removable core which allows for easier application of our tire sealant.Olympic and Flow lightweight tubeless rimstrip from only 40g.The Olympic rimstrip is mainly for use with NoTubes ZTR Olympic, ZTR Arch and ZTR 355 rims, but also good for converting UST rims to use standard tyres. More secure and easier inflation for running normal tyres than the valve and yellow tape combination.Also fits:Mavic UST wheels such as Crossmax, Shimano XT / XTR wheels.Also the Flow rimstrip, for use only in ZTR Flow rims.Other rim strips will not work with the ZTR Olympic, 355, Arch, or Flow.