Stan's Tubeless Conversion Rim Strip. Features: Converts non-tubeless wheelset to tubeless allowing the use of either standard or tubeless tires Patented Sealing Strip can be removed as easily as a tube and used repeatedly Removable valve core allows adding sealant without removing the tire (2oz injector bottle sold separately, SX-8053) Includes (1) tubeless sealing strip with valve stem and core (Stans Sealant sold separately, SX-805*) Please visit http://www.notubes.com/help_center_rim_strips.aspx for tips on selecting the correct strip 56g/wheel Specs: Model: Olympic Size: 26"/27.5"/29" Valve: Presta Width Rim: ZTR Olympic, ZTR 355, Arch Strip Dimensions: 47"x25mm