Burgtec 34. 9mm Seatpost Clamp Precision Parts for Real-World Demands. The seatpost clamp is an often-overlooked component until failure compromises your ride. Designed for the 34. 9mm seat tubes common on aggressive trail and enduro frames, this clamp ensures your dropper post stays locked through the harshest terrain and most demanding cycles. Built with the same elite-downhill durability that defines Burgtec, this is a small part engineered for a critical job. Features34. 9mm seat tube compatibility fits the diameter found on many trail, enduro, and downhill frames Secure clamping keeps seatpost position fixed through repeated dropper actuations and hard landings Burgtec construction standards designed and tested alongside components used at World Cup level Multiple colorway availability matches other Burgtec components for a consistent cockpit and contact-point build | Burgtec | 34. 9Mm Seatpost Clamp Race Red