Due the high number of combinations for upper and lower headsets PRO offers its upper and lower headsets separately. So you can arrange your own individual solution for your frame and fork.
The upper PRO EC headset with external cups comes with high quality double sealed cartridge bearing and anodized cups.
The delivery includes an ahead-cap, bolt and starnut.
describes the traditional 1 1/8" Ahead headset with external cups. The S.H.I.S. denotation (see attachment) of the upper part offered here is EC34/28,6.
Construction type (Ahead/Thread): ahead
Cup skirt length in mm: 10mm
Included in delivery: upper headset with aluminum cap, starnut, steel bolt
Material: aluminum, steel
Weight supplement: headset only - starnut, bolt, cap additional 25g - weighed by Bike24