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Pro Bike Supply

RockShox Tapered CSU ZEB Ult B1+ Butter Wagon 44OS Black

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 Year 2027+ Model ZEB B1+ Description 1.5>1-1/8" Alloy CSU Assembly