BBB Cycling Front Derailleur Clamp ShiftFix Lightweight Aluminium Bike Mount Seatpost Tube 31.8mm BSP 90

Amazon

LIGHTWEIGHT: this aluminium derailleur clamp is only 25 grams EASY TO MOUNT: attach the bike derailleur mount easily to your seatpost MULTIPLE SIZES: the Shiftfix is available for 31.8mm tube and 34.9mm diameters BBB CYCLING TOOLS: All the essentials for working on your road bike, mountain bike, gravel bike, or city bike.

Blacks

Key Features:Aluminium front derailleur clampFor frame tube diameters: 31.8 and 34.9mmWeight: 18g (31.8mm)