RockShox Alloy Tapered CSU ZEB A1+ (2021+) 27/29 44mm Bk

Tapered steerers (when offered) are designated by 1.5>1-1/8" spec info Replacement CSU (crown/steerer/upper) units and BoXXer crowns BoXXer top crown sizing reference (head tube+headset): short (3/4" drop): under 160mm/tall (2" drop): 160-190mm Yeah 2021+