This is a replacement non-drive side seal for the Hope Pro 2 hub.
The Trek Hardtail Convert Derailleur hanger used on Superfly , Procaliber, and some Stache, Farley bikes Trek Hardtail Convert Derailleur hange Features Derailleur hanger used on Superfly (on a rigid axle), Procaliber, and some Stache, Farley bikes...