Braze-on Adaptor Clamps | Shifters & Derailleurs | Problem Solvers
31.8/34.9mm Bicycle Front Derailleur Adapter Hanging/locking Front Derailleur Braze On Clamping Ring Band Adapter Clamp|Bicycle Derailleur| - AliExpress
Problem Solvers Braze-on Adaptor Clamp | Jenson USA
Origin8 MaxFit Braze-On Front Derailleur Adapter - Aloha Mountain Cyclery | Carbondale, CO
Brand New Durable 34.9mm Front Derailleur Braze-on Adapter Clamp Black | eBay
IRD Front Derailleur Clamp | Interloc Racing
Braze-on Adaptor Clamps | Shifters & Derailleurs | Problem Solvers