*Technical de
* Top head tube inside diameter : 44mm
*Stem clamp diamter : 28.6mm
*Bottom head tube inside diameter : 44mm
*Crown race seat diameter: 30mm
*Top stack height : 15mm
*Bearings : 2 x angular contact carridge bearings
* Weight : 75grams (include top cap, alloy bolt )
*Colors :black,blue,red.gold,silver,ti,pink,green