NO. 55R 1.5" ACR
• No rotation limit
• ACR top cover
• Angular contact bearing
• Specific frame required
• 1.5” headtube
• 36° / 45° ACB
• For 55.8mm OD head tube
• For 1-1/8” to 1.5” tapered fork
• Stack height 10.4+0.5=10.9
• 92 grams
Installation process in a 1.5" top and 1.5" bottom headtube was painless and works well. Integrated cables fit nicely and expander was better than the stock expander included with my bike.
This headset is an awesome compliment to the Metron 5 ACR bars. Using both as a replacement for a poorly-fabricated set of internally-routed bars and a dust cover + spacer stack that made contact with my carbon top tube when tightening the compression ****. No such issue with this system—the compression ring that sits in the bearing, along with the dust cover, provide plenty of clearance between the dust cover and the top tube surface.
The included bearings are the same diameter, top and bottom bearing. Will this set adapt to a a tapered headtube where the top bearing is smaller? In fact, which manufacturers build a frame without a tapered headtube?
FSA was quick to get this item out to me and it fit my application perfectly.