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Happy 2022! Our *new* Winter hours are M 11a-4p, Tu-F 11-6, SAT 10-6. (CLOSED Sunday). Check out our new stock (including 2022 models!) of Breezer, Marin, Fuji and SE for commuters, gravel crunchers, BMX and recreational riders. To schedule bike repair, click thru to our online appointment system below. We will accept walk-up repairs until March 1. We ask that clients be masked and vaccinated as a requisite to enter our store. Questions? E-mail us at or text/call us at 510-328-1158.

BOX Hollow Stem

BOX Hollow Stem
$85.95 - $107.95
Clamp Diameter:
Please select options


- Forged, CNC-machined 6061-T6 aluminum with hollow CrMo hex bolts - Open skeletal design and a dual mid-bolt wedge mounting system
- 1" or 1-1/8" steerer clamp

Part Numbers

Option UPC MPN
22.2mm / Black / 45mm / 6° / 1-inch 639266090847 BX-ST14H1N45-BK
22.2mm / Black / 48mm / 6° / 1-1/8-inch 639266088080 BX-ST13H0848-BK
22.2mm / Black / 53mm / 6° / 1-1/8-inch 639266088127 BX-ST13H0853-BK