34.9mm Bike Lightweight Front Derailleur Braze-on Adapter Mech Mount Clamp - Walmart.com
Brand New Durable 34.9mm Front Derailleur Braze-on Adapter Clamp Black | eBay
Problem Solvers Braze-On Front Derailleur Adapter - The Peddler Bike Shop | Austin
Shimano SM-AD91 Clamp for Dura-Ace/Ultegra/105/GRX Braze-on Front Derailleur - bike-components
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31.8/34.9mm Bicycle Front Derailleur Adapter Hanging/locking Front Derailleur Braze On Clamping Ring Band Adapter Clamp|Bicycle Derailleur| - AliExpress