FSA ACR / SMR ⌀52mm Headset System (45mm Spacers + SMR Adapter)

FSA No. 55R 1.5” ACR LS integrated headset with fully hidden cable routing, no rotation limit, and angular contact bearings—designed to work with the Zeppelin Road Frames (2026). Fits 55.8mm OD head tubes and 1-1/8” to 1.5” tapered forks. Set includes 45mm of spacers and SMR conversion adapter for standard FSA / SMR bar and stem combinations Includes: 1 x FSA 55R Headset ⌀52mm Bearing 1-1/8"/ 1.5", 36°/ 45° ACB 3 x 10mm FSA Carbon Split Washers (30mm) 3 x 5mm FSA Carbon Split Washers (15mm) 1 x FSA Spacer / Adapter SMR TO ACR 1 x Fork Compression Plug