Promax QR-1 Seatpost Clamp - 31.8mm QR Black MFPN=11.4015.547.160 One piece continuous carbon fiber

One piece continuous carbon fiber construction

Integrated adjustable arms allow it to fit virtually any four bolt stem with a stem bolt distance between 16mm and 41mm

}Promax Impact Mini 45mm Top Load Stem 1" Blue

4" compound Race Formulation Graphene + Silica bead folding type tubeless color black weight 740g

Promax QR-1 Seatpost Clamp - 31.8mm QR Black MFPN=11.4015.547.160 One piece continuous carbon fiberPromax QR 1 Quick Release Seatpost Clamp 31. 8mm Black. QR 1 seatpost clamps are cold forged and CNC machined from 6061 T6 aluminum alloy. The QR 1 as the name implies has a quick release lever making seat height adjustments a snap. Weighing just 30 grams 1. 1 ounces in the 31. 8 size its as lightweight as it is tough. The head of the lever and the face of the clamp are given a proprietary low friction surface treatment that ensures smooth lever