Shimano Clamp SM-AD91 for braze-on front derailleur - Makes clamp mounting possible 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 also comes with a shim which makes the clamp compatible with 28.6 mm seat tubes. Technical Information: Material: Aluminium Sizes: 31.8 mm (28.6 mm), 34.9 mm Compatibility: FD-R9250 FD-R9100 FD-R9150 FD-R8150 FD-R8000 FD-R8050 FD-R7150 FD-R7000 FD-RX810 FD-RX815 FD-RX400 Also Suitable for All Braze on FD Shimano/Sram/Campy Manufacturer Numbers: 31.8 mm: I-SMAD91MS 34.9 mm: I-SMAD91L Contents: 1 x Shimano SM-AD91 shim 1 x 28.6 mm adapter (only 31.8 mm version) 1 x bolts rm8 postage to peninsular malaysia rm15 for Sabah & Sarawak COD Petaling Jaya SS2 interested sms or whatapp me 016-249 1052 http://bicyclebuysell.com/#!brand=&page=1&priceFrom=&priceTo=&search=davidcheng&tab=search