Straitline Components Seat Post binder clamp 35mm

This Seat Post Collar uses a steel M6 bolt with steel barrel nut for superior clamping force and even clamping. This is the best seat binder we've found for heavy riders to prevent slipping of the seatpost during rides. on a steel, titanium, or aluminum frame clamp to 6nm and combine with friction paste and your seatpost slipping issues should be gone.  For Carbon frames, 3nm is a sufficient starting point.