Stan's ZTR Arch EX rim combines the lightweight design of their race-specific rims with more internal reinforcements to create a super-strong, singletrack-ready rim. The Arch EX also uses Stan's BST technology for easy tubeless conversions, while its wide inner profile and lowered sidewalls boost tire volume for enhanced traction.
Stan's NoTubes BST design creates a tight tubeless seal between the rim wall and tire bead. The inner rim wall is the same size and shape as the tire bead. It's also shorter, which increases the volume of the tire.