TIJA SA NEWMEN SEATPOST ADVANCED 30.9 30.9 x 430 mm Full-carbon seat post constructed from UD carbon fibre. Our top priority when designing this seat post was to incorporate flex for maximum comfort into a highly reliable, simple piece of technology. But maximum flex isn't everything. Seat posts with too much flex have two crucial disadvantages: 1. High cadences cause the rider to start bouncing 2. The lack of damping delivers an uncomfortable kickback when riding over obstacles seated. So some flex is good, but it must be controlled. And because we want to make biker's lives that little bit easier, we paid attention to the smallest details. Like using EPDM O-rings to prevent the threaded inserts in the upper clamp from falling out when loosening the bolts. easy installation; controlled flex; easy adjustment; safe clamping mechanism for carbon saddle rails size (DxL) 30.9 x 430 mm material Carbon weight 0,23 kg