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Instal The Front12/22/2023 ![]() Now tighten the derailleur’s support bolt using a size 2 hex wrench until it only just touches the clamp band. You do not have to install the support plate, since you'll tighten the support bolt to sit flush against the clamp band. Install the band adapter to the front derailleur using a size 5 hex wrench and the provided bolt. While you can probably get away with using any band adapter, I recommend using the one Shimano make, the SM-AD91 band adapter. ![]() If the frame you’re using does not have a mounting boss you will need a Front-derailleur band adapter. When there is no mounting boss on the frame Tighten the bolt until it touches the backup plate. The support bolt should touch the side of the backup plate without the tape. I haven’t used the support plate on my Cinelli, for example. Note that if the support bolt touches the frame’s mounting boss itself, you may not need the support plate. The support plate is the small metal plate you got with the front derailleur - it’s there to prevent damage to the frame itself. Now check where the derailleur’s support bolt hits the frame, and stick the support plate on the frame by peeling off the liner on the back. You’ll later tighten this bolt to sit flush against the frame, giving the derailleur something to push against when shifting. These derailleurs have a tiny bolt that goes through the derailleur and comes out the back. Tighten the bolt lightly - you’ll probably loosen it again later to fine-tune the height and angle. If your frame has a mounting boss, you take your size 5 hex wrench to loosely screw in the mounting bolt and attach the derailleur to the frame. How you do this depends on the frame itself. The 12-speed Ultegra Front Derailleur comes with a bolt and washer, a wire cover, and the support plate (not pictured) When there is a mounting boss on the frameįirst, you’ll need to attach the front derailleur to the frame. ![]()
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