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): 160-190mmItem Specifications: Description, 1.5>1-1/8" Alloy CSU Assembly, Year, 2018+, Model Name, Pike (B1) 29", 42mm Offset,.
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