Shimano

Shimano Clamp SM-AD91 for braze-on front derailleur  With 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-on sockets. The clamp is made of aluminium and is available for 34.9 mm and 31.8 mm seat tubes. The latter version al...