ONIPAX Anti-Theft Bike Seatpost Clamp 31.8mm 34.9mm Secure 7-Lobe Pin Bolt

• [SCENARIO-BASED ANTI-THEFT PROTECTION] Stop worrying about your expensive saddle when parking on campus or city streets. Traditional quick-release levers invite theft, but our unique 7-Lobe Pin bolt locks your seatpost securely, requiring the specialized matching key for removal.
• [FOOL-PROOF UPWARD ALIGNMENT] Avoid installation headaches and paint damage. Engineered with a smart internal lip, this collar must be installed with the size engraving facing upward. This allows the stop-limit ledge to sit perfectly on your frame, ensuring maximum security and a slip-free hold.
• [ULTRA-LIGHTWEIGHT & STURDY] Experience the perfect balance of security and performance. CNC machined from premium aluminum alloy, this single-bolt clamp eliminates unnecessary bulk while delivering heavy-duty clamping force for daily urban commutes or rugged gravel trail rides.
• [ALL-WEATHER DURABILITY] Built to endure harsh outdoor elements. The advanced anodized matte coating provides superior resistance against rust, heavy rain, winter road salt, and sweat, maintaining its sleek look and structural integrity year after year.
• [PRECISION FIT FOR COMMUTERS] Designed specifically for bicycle frames with a 31.8mm or 34.9mm outer diameter. Please measure your frame tube outer diameter (not the seatpost itself) to ensure a flawless fit on your road, mountain, or gravel bike.

Anti-Theft 31.8mm Seat Post Clamp fits on the out diameter 27.2mm 28.6mm bicycle seat post