Seat Post Shim Alloy, for 31.6mm post to fit 34.9mm L;60mm BLACK

Alloy shim designed to adapt 31.6mm seat posts to fit 34.9mm seat tubes. Precision-engineered for secure, rattle-free installation. Black finish matches most bike frames. Length: 60mm. Essential for compatibility when upgrading or replacing seat posts on bikes with larger diameter seat tubes.