Headset made for Piaggio Vespa Ciao Bravo and Grande mopeds. You must check your specs before ordering as some models do not use these special inverted cups.
It could even be used to mount different forks on your mopeds etc.
Head tube - 25.5mm x 1mm threading
Bearing cup insert OD - 30mm
Bearing race ID - 27mm
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Just what my 1974 ciao needed.