Rear derailleur hanger Sram UDH for 12mm rear thru-axles. Includes hanger nut. Includes dropout fixing bolt (the bolt is not used on all frames). Axle thread pitch: 1.0 The HT model is used on Orbea MTB hardtail (Alma) and non Concentric Pivot full suspension(Oiz) models.The FS model is used on Orbea MTB full suspension Concentric Pivot frames (Rallon M6) The Sram UDH rear derailleur hanger is the same in both options (HT and FS). The only change is the integrated washer on the external nut, that on the FS models has a 30mm diameter to cover the axle pivot point bearing. The HT option is compatible with Orbea MTB full suspension Concentric Pivot frames (Rallon M6), however the integrated washer may not cover the pivot point bearing completely. In case of purchasing the HT option to be used on full suspension frames, the original external nut can be used if the only component to be replaced is the derailleur hanger. To find the right component for your bicycle, introduce your barcode number in the designated field or consult your model´s Blue Paper technical manual and use the browser to introduce the article code. Consult the bicycle or component technical manual in the support section of our web to learn about the assembly instructions.