Shimano SM-AD91 Clamp for Dura-Ace/Ultegra/105/GRX Braze-on Front Derailleur

Shimano Clamp SM-AD91 for braze-on front derailleur - Makes clamp mounting possibleWith the Shimano SM-AD91 clamp, mechanical and electronic braze-on front derailleurs of the Dura-Ace, Ultegra, 105 and GRX groupsets can be attached to frames without braze-