Upper bearing: 1-1/8'' Campy, 45°/45° ACB (yellow seal)
Lower bearing: 1.5'', 36°/45° ACB
For tapered fork steerer 1-1/8''
Headtube OD: tapered 46 mm/56 mm
Stack height: 16 mm/1 mm
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Everything we distribute has been submitted to a trial year of thorough testing by ourselves, our company team riders and to a select number of independent test riders. This is done for one simple reason: we stand behind products that we personally trust and believe in.