Yeti SB D-Type Derailleur Cover Did you recently make the switch to a 1x drivetrain? Cover up and protect that empty derailleur mount on your SB or ARC Carbon with this custom aluminum Yetiman cover. Covers D-type derailleur mounts on Yeti SB and ARC carbon models. | Yeti Sb D-Type Derailleur Cover Black, Fits All Sb and Arc Carbon Models